diff --git a/src/openclpow.py b/src/openclpow.py
index 2f7f0158..641db324 100644
--- a/src/openclpow.py
+++ b/src/openclpow.py
@@ -24,7 +24,7 @@ except:
     libAvailable = False
 
 def initCL():
-    global ctx, queue, program, gpus, hash_dt, vendors
+    global ctx, queue, program, gpus, enabledGpus, hash_dt, vendors
     try:
         hash_dt = numpy.dtype([('target', numpy.uint64), ('v', numpy.str_, 73)])
         try: