diff --git a/src/memory.cc b/src/memory.cc
index cefcd5a..1386e8e 100644
--- a/src/memory.cc
+++ b/src/memory.cc
@@ -22,10 +22,10 @@ int gMemoryBlocksCurrentCount = 0;
 int gMemoryBlockMaximumCount = 0;
 
 // 0x51DEE4
-int gMemoryBlocksCurrentSize = 0;
+size_t gMemoryBlocksCurrentSize = 0;
 
 // 0x51DEE8
-int gMemoryBlocksMaximumSize = 0;
+size_t gMemoryBlocksMaximumSize = 0;
 
 // 0x4C5A80
 char* internal_strdup(const char* string)
diff --git a/src/memory.h b/src/memory.h
index c6e0de4..3db421e 100644
--- a/src/memory.h
+++ b/src/memory.h
@@ -29,8 +29,8 @@ extern ReallocProc* gReallocProc;
 extern FreeProc* gFreeProc;
 extern int gMemoryBlocksCurrentCount;
 extern int gMemoryBlockMaximumCount;
-extern int gMemoryBlocksCurrentSize;
-extern int gMemoryBlocksMaximumSize;
+extern size_t gMemoryBlocksCurrentSize;
+extern size_t gMemoryBlocksMaximumSize;
 
 char* internal_strdup(const char* string);
 void* internal_malloc(size_t size);