--- a/testing/geckodriver/mach_commands.py
+++ b/testing/geckodriver/mach_commands.py
@@ -39,17 +39,17 @@ class GeckoDriover(MachCommandBase):
     @CommandArgument("--debugger-args", default=None, metavar="params", type=str,
         group="debugging",
         help="Flags to pass to the debugger itself; split as the Bourne shell would.")
     def run(self, binary, params, debug, debugger, debugger_args):
         try:
             binpath = self.get_binary_path("geckodriver")
         except Exception as e:
                 print("It looks like geckodriver isn't built. "
-                      "Add ac_add_options --enable-geckodrver to your mozconfig ",
+                      "Add ac_add_options --enable-geckodriver to your mozconfig ",
                       "and run |mach build| to build it.")
                 print(e)
                 return 1
 
         args = [binpath]
 
         if params:
             args.extend(params)