diff --git a/src/ast/rewriter/seq_rewriter.cpp b/src/ast/rewriter/seq_rewriter.cpp
index f3aed58ec..43a5c5b5a 100644
--- a/src/ast/rewriter/seq_rewriter.cpp
+++ b/src/ast/rewriter/seq_rewriter.cpp
@@ -4371,6 +4371,9 @@ br_status seq_rewriter::mk_str_in_regexp(expr* a, expr* b, expr_ref& result) {
             return BR_REWRITE_FULL;
     }
 
+    return BR_FAILED;
+    // disabled
+
     expr_ref hd(m()), tl(m());
     if (get_head_tail(a, hd, tl)) {
         //result = re().mk_in_re(tl, re().mk_derivative(hd, b));