diff --git a/fish/.config/fish/functions/fasttags.fish b/fish/.config/fish/functions/fasttags.fish
index 60442b7..ba28a80 100644
--- a/fish/.config/fish/functions/fasttags.fish
+++ b/fish/.config/fish/functions/fasttags.fish
@@ -1,7 +1,9 @@
 function fasttags --description "Generate tags for Haskell project"
-    if not test -e tags
-        fast-tags --fully-qualified -R .
-    else
-        fast-tags --fully-qualified -R $argv
+    if test -d .git
+        if not test -e tags
+            fast-tags --fully-qualified -R .
+        else
+            fast-tags --fully-qualified -R $argv
+        end
     end
 end