diff --git a/src/build_reference_db.c b/src/build_reference_db.c
index 8ef1d02..c7c0c1c 100755
--- a/src/build_reference_db.c
+++ b/src/build_reference_db.c
@@ -863,7 +863,8 @@ int build_reference_db(const char* dms_name,
 	fprintf(stderr,"\rDone : 100 %%           \n");
 
 	// Add information about the threshold used to build the DB
-	snprintf(threshold_str, 5, "%f", threshold);
+#define snprintf_nowarn(...) (snprintf(__VA_ARGS__) < 0 ? abort() : (void)0)
+	snprintf_nowarn(threshold_str, 5, "%f", threshold);
 
 	new_comments = obi_add_comment((o_view->infos)->comments, DB_THRESHOLD_KEY_IN_COMMENTS, threshold_str);
 	if (new_comments == NULL)