diff --git a/shared/nm-utils/nm-macros-internal.h b/shared/nm-utils/nm-macros-internal.h
index 9d9016e428..4ee59f195e 100644
--- a/shared/nm-utils/nm-macros-internal.h
+++ b/shared/nm-utils/nm-macros-internal.h
@@ -35,6 +35,12 @@
 #define _nm_alignof(type)    __alignof (type)
 #define _nm_alignas(type)    _nm_align (_nm_alignof (type))
 
+#if __GNUC__ >= 7
+#define _nm_fallthrough      __attribute__ ((fallthrough))
+#else
+#define _nm_fallthrough
+#endif
+
 /*****************************************************************************/
 
 #ifdef thread_local