diff --git a/KeyUtil.cpp b/KeyUtil.cpp
index 2f9c876..25d5af3 100644
--- a/KeyUtil.cpp
+++ b/KeyUtil.cpp
@@ -54,7 +54,10 @@
 }
 
 bool generateStorageKey(const KeyGeneration& gen, KeyBuffer* key) {
-    if (!gen.allow_gen) return false;
+    if (!gen.allow_gen) {
+        LOG(ERROR) << "Generating storage key not allowed";
+        return false;
+    }
     if (gen.use_hw_wrapped_key) {
         if (gen.keysize != FSCRYPT_MAX_KEY_SIZE) {
             LOG(ERROR) << "Cannot generate a wrapped key " << gen.keysize << " bytes long";