diff --git a/src/core/u-crush.c b/src/core/u-crush.c
index 1312bcbc63..25153aaf4a 100644
--- a/src/core/u-crush.c
+++ b/src/core/u-crush.c
@@ -40,7 +40,6 @@
 #ifdef INCLUDE_CRUSH
 
 #ifdef _MSC_VER
-#define _CRT_SECURE_NO_WARNINGS
 #define _CRT_DISABLE_PERFCRIT_LOCKS
 #endif