1 files changed, 1 insertions, 0 deletions
diff --git a/json.c b/json.c
index 22a3ae2..f099554 100644
--- a/json.c
+++ b/json.c
@@ -11,6 +11,7 @@
 // `comma` is used to track whether a comma will need to be printed before the
 // next object or not.
 //
+__attribute__((nonnull))
 static int _json_match(const char *text, match_t *m, int comma, int verbose)
 {
     if (!verbose) {