diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 87de809..2c59a76 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -2564,6 +2564,7 @@
 
 	local expansion=$(__git_aliased_command "$command")
 	if [ -n "$expansion" ]; then
+		words[1]=$expansion
 		completion_func="_git_${expansion//-/_}"
 		declare -f $completion_func >/dev/null && $completion_func
 	fi
diff --git a/contrib/completion/git-completion.zsh b/contrib/completion/git-completion.zsh
index 6b77968..9f6f0fa 100644
--- a/contrib/completion/git-completion.zsh
+++ b/contrib/completion/git-completion.zsh
@@ -104,6 +104,7 @@
 
 	local expansion=$(__git_aliased_command "$command")
 	if [ -n "$expansion" ]; then
+		words[1]=$expansion
 		completion_func="_git_${expansion//-/_}"
 		declare -f $completion_func >/dev/null && $completion_func
 	fi