diff --git a/src/libnm-core-impl/nm-utils.c b/src/libnm-core-impl/nm-utils.c
index c389213f3f..efb7be5c88 100644
--- a/src/libnm-core-impl/nm-utils.c
+++ b/src/libnm-core-impl/nm-utils.c
@@ -4600,7 +4600,7 @@ nm_utils_bond_mode_string_to_int(const char *mode)
 
 struct _NMUtilsStrStrDictKey {
     char type;
-    char data[1];
+    char data[];
 };
 
 guint