about summary refs log tree commit diff
diff options
context:
space:
mode:
-rw-r--r--src/afl-gotcpu.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/afl-gotcpu.c b/src/afl-gotcpu.c
index 4163ad65..9db86933 100644
--- a/src/afl-gotcpu.c
+++ b/src/afl-gotcpu.c
@@ -26,7 +26,9 @@
  */
 
 #define AFL_MAIN
-#define _GNU_SOURCE
+#ifndef _GNU_SOURCE
+#  define _GNU_SOURCE
+#endif
 
 #include <stdio.h>
 #include <stdlib.h>