diff --git a/Makefile b/Makefile
index f8299e8..8db1c7a 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ ifdef TRAVIS
 endif
 
 check-fmt:
-	bash -c "diff --line-format='%L' <(echo -n) <(gofmt -d -s .)"
+	bash -c 'diff --line-format="%L" <(echo -n) <(gofmt -d -s $$(find . -type f -name "*.go" -not -path "./vendor/*"))'
 
 lint: check-fmt vet megacheck