diff --git a/share/completions/git.fish b/share/completions/git.fish
index aeb6a6e0f..4d45aea1e 100644
--- a/share/completions/git.fish
+++ b/share/completions/git.fish
@@ -799,7 +799,7 @@ format:\tSpecify which information to show"
 end
 
 function __fish_git_is_rebasing
-    test -e (__fish_git rev-parse --git-path rebase-merge)
+    test -e (__fish_git rev-parse --absolute-git-dir)/rebase-merge
 end
 
 # general options