diff --git a/include/pdu_cacher.h b/include/pdu_cacher.h
index 257138c..8998672 100644
--- a/include/pdu_cacher.h
+++ b/include/pdu_cacher.h
@@ -130,11 +130,9 @@ public:
     /**
      * Forwards the call to the cached PDU. \sa PDU::clone_packet.
      */
-    TINS_DEPRECATED(
-        PDU *clone_packet(const uint8_t *ptr, uint32_t total_sz) {
-            return 0;
-        }
-    )
+    TINS_DEPRECATED(PDU *clone_packet(const uint8_t *ptr, uint32_t total_sz)) {
+        return 0;
+    }
 private:
     void write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *parent) {
         if(cached_serialization.size() != total_sz) {