diff -r 6691e007cef7 -r 473d8cb58a6c ui/motif/pathbar.c
--- a/ui/motif/pathbar.c	Wed Dec 31 12:37:09 2025 +0100
+++ b/ui/motif/pathbar.c	Wed Dec 31 16:40:12 2025 +0100
@@ -186,9 +186,9 @@
     
     cxmutstr url;
     if(add_separator) {
-        url = cx_strcat(3, base, cx_str("/"), path);
+        url = cx_strcat(CX_NULLSTR, 3, base, cx_str("/"), path);
     } else {
-        url = cx_strcat(2, base, path);
+        url = cx_strcat(CX_NULLSTR, 2, base, path);
     }
     
     return url;