diff --git a/src/pcre2_dfa_match.c b/src/pcre2_dfa_match.c
index b78ad07..ca235fb 100644
--- a/src/pcre2_dfa_match.c
+++ b/src/pcre2_dfa_match.c
@@ -2176,7 +2176,7 @@ for (;;)
       case OP_NOTI:
       if (clen > 0)
         {
-        unsigned int otherd;
+        uint32_t otherd;
 #ifdef SUPPORT_UNICODE
         if (utf && d >= 128)
           otherd = UCD_OTHERCASE(d);