diff --git a/bin/git-ignore b/bin/git-ignore
index c0e91fb..723550c 100755
--- a/bin/git-ignore
+++ b/bin/git-ignore
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-: ${GIT_DIR:=.git}
+: ${GIT_DIR:=$(git rev-parse --git-dir)}
 
 function show_contents {
   local file="${2/#~/$HOME}"