diff --git a/bfg.tcl b/bfg.tcl
index 704c665..67a4cf1 100755
--- a/bfg.tcl
+++ b/bfg.tcl
@@ -675,8 +675,8 @@ proc render_handler_gemini {prevurl rooturl path body textw} {
     if {[llength $statusparts] > 1} {
       set statusinfo [join [lrange $statusparts 1 end] " "]
     }
-    if {($statuscode < 10) || ($statuscode > 100)} {
-      $textw insert end "Error $statuscode: $statusinfo\n" errormsg
+    if {($statuscode < 10) || ($statuscode > 99)} {
+      $textw insert end "Invalid status code $statuscode: $statusinfo\n" errormsg
       return
     }
     # reset redirect counter if the code group is not 3