diff --git a/src/regexp.c b/src/regexp.c
index cf0ea5d..811087d 100644
--- src/regexp.c
+++ src/regexp.c
@@ -50,7 +50,7 @@
     ret = fa_restrict_alphabet(r->pattern->str, strlen(r->pattern->str),
                                &nre, &nre_len, 2, 1);
     if (ret == 0) {
-        pat = escape(nre, nre_len);
+        pat = escape(nre, nre_len, RX_ESCAPES);
         free(nre);
     }
 #endif
