diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index 2b9e4d9..edb81e5 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -420,7 +420,9 @@ let s:addr_other = has('patch-8.1.560') ? '-addr=other' : ''
 let s:addr_tabs  = has('patch-7.4.542') ? '-addr=tabs' : ''
 let s:addr_wins  = has('patch-7.4.542') ? '-addr=windows' : ''
 
-command! -bang -nargs=? -range=-1 -complete=customlist,fugitive#Complete G   exe fugitive#Command(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)
+if exists(':G') != 2
+  command! -bang -nargs=? -range=-1 -complete=customlist,fugitive#Complete G   exe fugitive#Command(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)
+endif
 command! -bang -nargs=? -range=-1 -complete=customlist,fugitive#Complete Git exe fugitive#Command(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)
 
 if exists(':Gstatus') !=# 2