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-rw-r--r--src/helper/jim.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/helper/jim.c b/src/helper/jim.c
index f0d17525..e0f84565 100644
--- a/src/helper/jim.c
+++ b/src/helper/jim.c
@@ -11984,7 +11984,7 @@ static int Jim_EnvCoreCommand(Jim_Interp *interp, int argc,
if (argc == 1) {
-#if ! HAVE_UNISTD_H || IS_DARWIN
+#if !defined(HAVE_UNISTD_H) || IS_DARWIN
extern char **environ;
#endif