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-rw-r--r--mailmap.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mailmap.c b/mailmap.c
index d1f7c0d272..462b395634 100644
--- a/mailmap.c
+++ b/mailmap.c
@@ -8,6 +8,7 @@
#define debug_mm(...) fprintf(stderr, __VA_ARGS__)
#define debug_str(X) ((X) ? (X) : "(none)")
#else
+__attribute__((format (printf, 1, 2)))
static inline void debug_mm(const char *format, ...) {}
static inline const char *debug_str(const char *s) { return s; }
#endif