diff --git a/src/workprover/fastsolver/common.h b/src/workprover/fastsolver/common.h
index bdca9232..a4ef1b7d 100644
--- a/src/workprover/fastsolver/common.h
+++ b/src/workprover/fastsolver/common.h
@@ -1,6 +1,12 @@
 #ifndef COMMON_H
     #define COMMON_H
 
+    #ifdef _WIN32
+        #define EXPORT __declspec(dllexport)
+    #else
+        #define EXPORT __attribute__ ((visibility("default")))
+    #endif
+
     extern volatile int run;
 
     #define SEED_LENGTH (32 + 8)
diff --git a/src/workprover/fastsolver/main.map b/src/workprover/fastsolver/main.map
deleted file mode 100644
index 175c370d..00000000
--- a/src/workprover/fastsolver/main.map
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-    global: fastsolver_*;
-    local: *;
-};
diff --git a/src/workprover/fastsolver/makefile b/src/workprover/fastsolver/makefile
index e4b08034..17be4224 100644
--- a/src/workprover/fastsolver/makefile
+++ b/src/workprover/fastsolver/makefile
@@ -1,8 +1,9 @@
-CFLAGS += -std=gnu99 -Wall -Wextra -pedantic -O3 -fPIC
-LDFLAGS += -shared -lpthread -lcrypto -Wl,-version-script=main.map
+CFLAGS += -std=gnu99 -Wall -Wextra -pedantic -O3 -fPIC -fvisibility=hidden
+LDFLAGS += -shared
+LDLIBS = -lpthread -lcrypto
 
-libfastsolver.so: main.map common.o pthread.o
-	$(CC) $(LDFLAGS) -o $@ common.o pthread.o
+libfastsolver.so: common.o pthread.o
+	$(CC) $(LDFLAGS) -o $@ common.o pthread.o $(LDLIBS)
 
 common.o: common.h common.c
 pthread.o: common.h pthread.c
diff --git a/src/workprover/fastsolver/options.txt b/src/workprover/fastsolver/options.txt
index cd8fe863..69a53889 100644
--- a/src/workprover/fastsolver/options.txt
+++ b/src/workprover/fastsolver/options.txt
@@ -1 +1 @@
-/Ox /MD common.c winapi.c /link /DLL /OUT:libfastsolver.dll /EXPORT:fastsolver_add /EXPORT:fastsolver_remove /EXPORT:fastsolver_search libcrypto.lib
+/Ox /MD common.c winapi.c /link /DLL /OUT:libfastsolver.dll libcrypto.lib
diff --git a/src/workprover/fastsolver/pthread.c b/src/workprover/fastsolver/pthread.c
index fc62b98a..a9f47eb5 100644
--- a/src/workprover/fastsolver/pthread.c
+++ b/src/workprover/fastsolver/pthread.c
@@ -104,7 +104,7 @@ static int initialize(void) {
     error_lock: return 0;
 }
 
-size_t fastsolver_add(void) {
+EXPORT size_t fastsolver_add(void) {
     #ifdef SCHED_IDLE
         int policy = SCHED_IDLE;
     #else
@@ -135,7 +135,7 @@ size_t fastsolver_add(void) {
     return threads_count;
 }
 
-size_t fastsolver_remove(size_t count) {
+EXPORT size_t fastsolver_remove(size_t count) {
     size_t i;
 
     pthread_mutex_lock(&lock);
@@ -154,7 +154,7 @@ size_t fastsolver_remove(size_t count) {
     return threads_count;
 }
 
-int fastsolver_search(
+EXPORT int fastsolver_search(
     char *local_nonce,
     unsigned long long *local_iterations_count,
     const char *local_initial_hash,
diff --git a/src/workprover/fastsolver/winapi.c b/src/workprover/fastsolver/winapi.c
index b620aeb8..1f8fe045 100644
--- a/src/workprover/fastsolver/winapi.c
+++ b/src/workprover/fastsolver/winapi.c
@@ -1,160 +1,160 @@
-#include <string.h>
-
-#include <Windows.h>
-
-#include "common.h"
-
-static int initialized;
-
-#define MAXIMUM_THREADS_COUNT 4096
-
-static size_t threads_count;
-static HANDLE threads[MAXIMUM_THREADS_COUNT];
-
-static CRITICAL_SECTION lock;
-static CONDITION_VARIABLE start = CONDITION_VARIABLE_INIT;
-static CONDITION_VARIABLE done = CONDITION_VARIABLE_INIT;
-
-static size_t running_threads_count;
-
-static int found;
-static char best_nonce[8];
-static unsigned long long total_iterations_count;
-
-DWORD WINAPI thread_function(LPVOID argument) {
-    size_t thread_number = (HANDLE *) argument - threads;
-
-    while (1) {
-        char nonce[8];
-        unsigned long long iterations_count = 0;
-        int result;
-
-        EnterCriticalSection(&lock);
-
-        while (!run && threads_count > thread_number) {
-            SleepConditionVariableCS(&start, &lock, INFINITE);
-        }
-
-        if (threads_count <= thread_number) {
-            LeaveCriticalSection(&lock);
-
-            return 0;
-        }
-
-        ++running_threads_count;
-
-        LeaveCriticalSection(&lock);
-
-        result = work(nonce, &iterations_count, thread_number);
-
-        EnterCriticalSection(&lock);
-
-        if (result == 1) {
-            found = 1;
-            memcpy(best_nonce, nonce, 8);
-        }
-
-        total_iterations_count += iterations_count;
-
-        run = 0;
-        --running_threads_count;
-
-        WakeConditionVariable(&done);
-        LeaveCriticalSection(&lock);
-    }
-}
-
-static int initialize(void) {
-    if (initialized == 1) {
-        return 1;
-    }
-
-    InitializeCriticalSection(&lock);
-
-    initialized = 1;
-
-    return 1;
-}
-
-size_t fastsolver_add(void) {
-    if (initialize() == 0) {
-        return threads_count;
-    }
-
-    EnterCriticalSection(&lock);
-
-    threads[threads_count] = CreateThread(NULL, 0, thread_function, &threads[threads_count], 0, NULL);
-
-    if (threads[threads_count] == NULL) {
-        LeaveCriticalSection(&lock);
-
-        return threads_count;
-    }
-
-    SetThreadPriority(threads[threads_count], THREAD_PRIORITY_IDLE);
-
-    ++threads_count;
-
-    LeaveCriticalSection(&lock);
-
-    return threads_count;
-}
-
-size_t fastsolver_remove(size_t count) {
-    size_t i;
-
-    EnterCriticalSection(&lock);
-
-    threads_count -= count;
-
-    WakeAllConditionVariable(&start);
-    LeaveCriticalSection(&lock);
-
-    WaitForMultipleObjects(count, threads + threads_count, TRUE, INFINITE);
-
-    for (i = 0; i < count; ++i) {
-        CloseHandle(threads[threads_count + i]);
-    }
-
-    return threads_count;
-}
-
-int fastsolver_search(
-    char *local_nonce,
-    unsigned long long *local_iterations_count,
-    const char *local_initial_hash,
-    unsigned long long local_target,
-    const char *local_seed,
-    unsigned long long timeout
-) {
-    initial_hash = local_initial_hash;
-    target = local_target;
-    seed = local_seed;
-
-    found = 0;
-    total_iterations_count = 0;
-
-    EnterCriticalSection(&lock);
-
-    run = 1;
-
-    WakeAllConditionVariable(&start);
-
-    SleepConditionVariableCS(&done, &lock, timeout / 1000);
-
-    run = 0;
-
-    while (running_threads_count != 0) {
-        SleepConditionVariableCS(&done, &lock, INFINITE);
-    }
-
-    LeaveCriticalSection(&lock);
-
-    if (found) {
-        memcpy(local_nonce, best_nonce, 8);
-    }
-
-    *local_iterations_count = total_iterations_count;
-
-    return found;
-}
+#include <string.h>
+
+#include <Windows.h>
+
+#include "common.h"
+
+static int initialized;
+
+#define MAXIMUM_THREADS_COUNT 4096
+
+static size_t threads_count;
+static HANDLE threads[MAXIMUM_THREADS_COUNT];
+
+static CRITICAL_SECTION lock;
+static CONDITION_VARIABLE start = CONDITION_VARIABLE_INIT;
+static CONDITION_VARIABLE done = CONDITION_VARIABLE_INIT;
+
+static size_t running_threads_count;
+
+static int found;
+static char best_nonce[8];
+static unsigned long long total_iterations_count;
+
+DWORD WINAPI thread_function(LPVOID argument) {
+    size_t thread_number = (HANDLE *) argument - threads;
+
+    while (1) {
+        char nonce[8];
+        unsigned long long iterations_count = 0;
+        int result;
+
+        EnterCriticalSection(&lock);
+
+        while (!run && threads_count > thread_number) {
+            SleepConditionVariableCS(&start, &lock, INFINITE);
+        }
+
+        if (threads_count <= thread_number) {
+            LeaveCriticalSection(&lock);
+
+            return 0;
+        }
+
+        ++running_threads_count;
+
+        LeaveCriticalSection(&lock);
+
+        result = work(nonce, &iterations_count, thread_number);
+
+        EnterCriticalSection(&lock);
+
+        if (result == 1) {
+            found = 1;
+            memcpy(best_nonce, nonce, 8);
+        }
+
+        total_iterations_count += iterations_count;
+
+        run = 0;
+        --running_threads_count;
+
+        WakeConditionVariable(&done);
+        LeaveCriticalSection(&lock);
+    }
+}
+
+static int initialize(void) {
+    if (initialized == 1) {
+        return 1;
+    }
+
+    InitializeCriticalSection(&lock);
+
+    initialized = 1;
+
+    return 1;
+}
+
+EXPORT size_t fastsolver_add(void) {
+    if (initialize() == 0) {
+        return threads_count;
+    }
+
+    EnterCriticalSection(&lock);
+
+    threads[threads_count] = CreateThread(NULL, 0, thread_function, &threads[threads_count], 0, NULL);
+
+    if (threads[threads_count] == NULL) {
+        LeaveCriticalSection(&lock);
+
+        return threads_count;
+    }
+
+    SetThreadPriority(threads[threads_count], THREAD_PRIORITY_IDLE);
+
+    ++threads_count;
+
+    LeaveCriticalSection(&lock);
+
+    return threads_count;
+}
+
+EXPORT size_t fastsolver_remove(size_t count) {
+    size_t i;
+
+    EnterCriticalSection(&lock);
+
+    threads_count -= count;
+
+    WakeAllConditionVariable(&start);
+    LeaveCriticalSection(&lock);
+
+    WaitForMultipleObjects(count, threads + threads_count, TRUE, INFINITE);
+
+    for (i = 0; i < count; ++i) {
+        CloseHandle(threads[threads_count + i]);
+    }
+
+    return threads_count;
+}
+
+EXPORT int fastsolver_search(
+    char *local_nonce,
+    unsigned long long *local_iterations_count,
+    const char *local_initial_hash,
+    unsigned long long local_target,
+    const char *local_seed,
+    unsigned long long timeout
+) {
+    initial_hash = local_initial_hash;
+    target = local_target;
+    seed = local_seed;
+
+    found = 0;
+    total_iterations_count = 0;
+
+    EnterCriticalSection(&lock);
+
+    run = 1;
+
+    WakeAllConditionVariable(&start);
+
+    SleepConditionVariableCS(&done, &lock, timeout / 1000);
+
+    run = 0;
+
+    while (running_threads_count != 0) {
+        SleepConditionVariableCS(&done, &lock, INFINITE);
+    }
+
+    LeaveCriticalSection(&lock);
+
+    if (found) {
+        memcpy(local_nonce, best_nonce, 8);
+    }
+
+    *local_iterations_count = total_iterations_count;
+
+    return found;
+}