diff --git a/src/git-ahead-check.cr b/src/git-ahead-check.cr
index 7dd8261..f3abe06 100644
--- a/src/git-ahead-check.cr
+++ b/src/git-ahead-check.cr
@@ -21,6 +21,10 @@ def check_repo(repo_path : String)
     return 0
   end
 
+  if !Dir.exists?("#{repo_path}/.git")
+    return 0
+  end
+
   repo_name = repo_path.split("/")[-1]
   ahead_count = `git -C #{repo_path} status | grep -i "Your branch" | grep -Eo "[0-9]"`.chomp