diff --git a/src/row.h b/src/row.h
index ee96bdc..1f5e630 100644
--- a/src/row.h
+++ b/src/row.h
@@ -21,6 +21,7 @@ fort_row_t *copy_row(fort_row_t *row);
 FT_INTERNAL
 fort_row_t *create_row_from_string(const char *str);
 
+FT_PRINTF_ATTRIBUTE_FORMAT(1, 0)
 FT_INTERNAL
 fort_row_t *create_row_from_fmt_string(const char  *fmt, va_list *va_args);