diff --git a/lib/Makefile b/lib/Makefile
index 30d0b80ba0321f5e27ac9173769de812b04563e6..ed696a878ae4cc8bdbb0292731f8e2e69cbbe32d 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -1,6 +1,6 @@
 all:
 	cd c ; make
-#	cd csharp ; make
+	cd csharp ; make
 	cd java ; make
 
 test: