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-rw-r--r--src/emman.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/emman.c b/src/emman.c
index 0b511f9..65cc9e0 100644
--- a/src/emman.c
+++ b/src/emman.c
@@ -1,5 +1,6 @@
/* enable mremap on GNU/Linux */
#ifdef __linux__
+# undef _GNU_SOURCE
# define _GNU_SOURCE
#endif