diff --git a/libhidlcache/MemoryDealer.cpp b/libhidlcache/MemoryDealer.cpp
index e9196a1..dea7bc7 100644
--- a/libhidlcache/MemoryDealer.cpp
+++ b/libhidlcache/MemoryDealer.cpp
@@ -240,7 +240,7 @@
             return freed;
         }
     }
-    return 0;
+    return nullptr;
 }
 
 void SimpleBestFitAllocator::dump(const char* tag) const {