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-rw-r--r--src/env/clearenv.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/env/clearenv.c b/src/env/clearenv.c
index a2475ce7..62d50952 100644
--- a/src/env/clearenv.c
+++ b/src/env/clearenv.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
 #include <stdlib.h>
 
 extern char **__environ;