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-rw-r--r--include/afl-fuzz.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/afl-fuzz.h b/include/afl-fuzz.h
index 9da5cc03..27668da0 100644
--- a/include/afl-fuzz.h
+++ b/include/afl-fuzz.h
@@ -31,7 +31,7 @@
 #define MESSAGES_TO_STDOUT
 
 #ifndef _GNU_SOURCE
-  #define _GNU_SOURCE 1
+  #define _GNU_SOURCE
 #endif
 #ifndef _FILE_OFFSET_BITS
   #define _FILE_OFFSET_BITS 64