diff --git a/runtime/src/main/cpp/Memory.cpp b/runtime/src/main/cpp/Memory.cpp
index 17d5e245fbe..f51d4f22b6b 100644
--- a/runtime/src/main/cpp/Memory.cpp
+++ b/runtime/src/main/cpp/Memory.cpp
@@ -76,12 +76,12 @@ void InitMemory() {
 }
 
 // Now we ignore all placement hints and always allocate heap space for new object.
-void* AllocInstance(const TypeInfo* type_info, PlacementHint hint) {
+ObjHeader* AllocInstance(const TypeInfo* type_info, PlacementHint hint) {
   RuntimeAssert(type_info->instanceSize_ >= 0, "must be an object");
   return ObjectContainer(type_info).GetPlace();
 }
 
-void* AllocArrayInstance(
+ArrayHeader* AllocArrayInstance(
     const TypeInfo* type_info, PlacementHint hint, uint32_t elements) {
   RuntimeAssert(type_info->instanceSize_ < 0, "must be an array");
   return ArrayContainer(type_info, elements).GetPlace();
diff --git a/runtime/src/main/cpp/Memory.h b/runtime/src/main/cpp/Memory.h
index cdc3aeaf87f..21d85c44af2 100644
--- a/runtime/src/main/cpp/Memory.h
+++ b/runtime/src/main/cpp/Memory.h
@@ -263,8 +263,8 @@ extern "C" {
 #endif
 
 void InitMemory();
-void* AllocInstance(const TypeInfo* type_info, PlacementHint hint);
-void* AllocArrayInstance(
+ObjHeader* AllocInstance(const TypeInfo* type_info, PlacementHint hint);
+ArrayHeader* AllocArrayInstance(
     const TypeInfo* type_info, PlacementHint hint, uint32_t elements);
 #ifdef __cplusplus
 }