diff --git a/hack/update-codegen.sh b/hack/update-codegen.sh
index bad3cb2e3b7..a5cbcb5a86f 100755
--- a/hack/update-codegen.sh
+++ b/hack/update-codegen.sh
@@ -728,6 +728,12 @@ function codegen::informers() {
         done
     fi
 
+    git_grep -l --null \
+        -e '^// Code generated by informer-gen. DO NOT EDIT.$' \
+        -- \
+        ':(glob)staging/src/k8s.io/client-go/**/*.go' \
+        | xargs -0 rm -f
+
     "${informergen}" \
         --go-header-file "${BOILERPLATE_FILENAME}" \
         --output-base "${KUBE_ROOT}/vendor" \