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-rw-r--r--include/features.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/features.h b/include/features.h
index 07680a09e..0f4921b9f 100644
--- a/include/features.h
+++ b/include/features.h
@@ -266,7 +266,7 @@
# define __USE_REENTRANT 1
#endif
-#if _FORTIFY_SOURCE > 0 && __GNUC_PREREQ (4, 1) && __OPTIMIZE__ > 0
+#if _FORTIFY_SOURCE > 0 && __GNUC_PREREQ (4, 1) && defined(__OPTIMIZE__)
# if _FORTIFY_SOURCE == 1
# define __USE_FORTIFY_LEVEL 1
# elif _FORTIFY_SOURCE > 1