--- a/modules/metadata/mod_headers.c	2024/06/24 17:52:31	1918559
+++ b/modules/metadata/mod_headers.c	2024/06/24 17:54:34	1918560
@@ -783,14 +783,14 @@
             break;
         case hdr_set:
             if (!ap_cstr_casecmp(hdr->header, "Content-Type")) {
-                 ap_set_content_type(r, process_tags(hdr, r));
+                 ap_set_content_type_ex(r, process_tags(hdr, r), 1);
             }
             apr_table_setn(headers, hdr->header, process_tags(hdr, r));
             break;
         case hdr_setifempty:
             if (NULL == apr_table_get(headers, hdr->header)) {
                 if (!ap_cstr_casecmp(hdr->header, "Content-Type")) {
-                    ap_set_content_type(r, process_tags(hdr, r));
+                    ap_set_content_type_ex(r, process_tags(hdr, r), 1);
                 }
                 apr_table_setn(headers, hdr->header, process_tags(hdr, r));
             }
@@ -809,7 +809,7 @@
                 const char *repl = process_regexp(hdr, r->content_type, r);
                 if (repl == NULL)
                     return 0;
-                ap_set_content_type(r, repl);
+                ap_set_content_type_ex(r, repl, 1);
             }
             if (apr_table_get(headers, hdr->header)) {
                 edit_do ed;