diff --git a/tests/server/util.c b/tests/server/util.c
index 8158cb291..bd6542826 100644
--- a/tests/server/util.c
+++ b/tests/server/util.c
@@ -55,7 +55,7 @@
 #define EINVAL  22 /* errno.h value */
 #endif
 
-#if __MINGW32__
+#ifdef __MINGW32__
 #include <TlHelp32.h>
 #endif