diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 6f2bc60707..279f04df87 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -1399,6 +1399,12 @@ _git_clean ()
 
 _git_clone ()
 {
+	case "$prev" in
+	-c|--config)
+		__git_complete_config_variable_name_and_value
+		return
+		;;
+	esac
 	case "$cur" in
 	--*)
 		__gitcomp_builtin clone