diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..776a13c1
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+# Pickle files (for testing) should always have UNIX line endings.
+# Windows issue like here https://stackoverflow.com/questions/556269
+knownnodes.dat text eol=lf