diff --git a/hack/update-codegen.sh b/hack/update-codegen.sh
index 64dbd1f690a..9d464be9298 100755
--- a/hack/update-codegen.sh
+++ b/hack/update-codegen.sh
@@ -184,6 +184,8 @@ function codegen::deepcopy() {
         done
     fi
 
+    git_find -z ':(glob)**'/"${output_base}.go" | xargs -0 rm -f
+
     ./hack/run-in-gopath.sh "${gen_deepcopy_bin}" \
         --v "${KUBE_VERBOSE}" \
         --logtostderr \