diff --git a/libs/ui/GraphicBufferAllocator.cpp b/libs/ui/GraphicBufferAllocator.cpp
index b2b9680..3a90a98 100644
--- a/libs/ui/GraphicBufferAllocator.cpp
+++ b/libs/ui/GraphicBufferAllocator.cpp
@@ -69,9 +69,9 @@
 
 GraphicBufferAllocator::~GraphicBufferAllocator() {}
 
-size_t GraphicBufferAllocator::getTotalSize() const {
+uint64_t GraphicBufferAllocator::getTotalSize() const {
     Mutex::Autolock _l(sLock);
-    size_t total = 0;
+    uint64_t total = 0;
     for (size_t i = 0; i < sAllocList.size(); ++i) {
         total += sAllocList.valueAt(i).size;
     }
@@ -81,7 +81,7 @@
 void GraphicBufferAllocator::dump(std::string& result) const {
     Mutex::Autolock _l(sLock);
     KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
-    size_t total = 0;
+    uint64_t total = 0;
     result.append("Allocated buffers:\n");
     const size_t c = list.size();
     for (size_t i=0 ; i<c ; i++) {
diff --git a/libs/ui/include/ui/GraphicBufferAllocator.h b/libs/ui/include/ui/GraphicBufferAllocator.h
index 34a5b17..a182104 100644
--- a/libs/ui/include/ui/GraphicBufferAllocator.h
+++ b/libs/ui/include/ui/GraphicBufferAllocator.h
@@ -72,7 +72,7 @@
 
     status_t free(buffer_handle_t handle);
 
-    size_t getTotalSize() const;
+    uint64_t getTotalSize() const;
 
     void dump(std::string& res) const;
     static void dumpToSystemLog();