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-rw-r--r--gsm_ms.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/gsm_ms.h b/gsm_ms.h
index 822f0a6..e30f2fd 100644
--- a/gsm_ms.h
+++ b/gsm_ms.h
@@ -1,3 +1,6 @@
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
extern "C" {
#include <osmocom/bb/common/osmocom_data.h>
#include <osmocom/bb/mobile/mncc.h>