diff --git a/src/util/u_process.c b/src/util/u_process.c
index 2965e46a436..a05fa57e95f 100644
--- a/src/util/u_process.c
+++ b/src/util/u_process.c
@@ -131,7 +131,7 @@ __getProgramName()
 }
 
 #    define GET_PROGRAM_NAME() __getProgramName()
-#elif defined(WIN32)
+#elif DETECT_OS_WINDOWS
 static const char *
 __getProgramName()
 {