--- a/lib/tre-parse.c
+++ b/lib/tre-parse.c
@@ -641,7 +641,7 @@ tre_parse_bound(tre_parse_ctx_t *ctx, tre_ast_node_t **result)
     }
 
   /* Check that the repeat counts are sane. */
-  if ((max >= 0 && min > max) || max > RE_DUP_MAX)
+  if ((max >= 0 && min > max) || max > RE_DUP_MAX || min > RE_DUP_MAX)
     return REG_BADBR;