diff --git a/src/cli.zig b/src/cli.zig
index 9ee5d4d6d..8eda8588a 100644
--- a/src/cli.zig
+++ b/src/cli.zig
@@ -518,7 +518,7 @@ pub fn Builder(comptime commands: anytype) type {
                 }
             }
 
-            return error.UnknownCommand;
+            return unknownCommand(cmd_str);
         }
 
         /// Turns a snake_case string to kebab-case in comptime.