diff --git a/lib/git.zsh b/lib/git.zsh
index 444b30f3d..17b05d59d 100644
--- a/lib/git.zsh
+++ b/lib/git.zsh
@@ -57,7 +57,7 @@ git_remote_status() {
 
 # Checks if there are commits ahead from remote
 function git_prompt_ahead() {
-  if [[ -n $(git rev-list -1 origin/$(current_branch)..HEAD 2>/dev/null) ]]; then
+  if [[ -n $(git rev-list -1 --first-parent @{upstream}..HEAD 2>/dev/null) ]]; then
     echo "$ZSH_THEME_GIT_PROMPT_AHEAD"
   fi
 }