diff --git a/libs/ui/GraphicBuffer.cpp b/libs/ui/GraphicBuffer.cpp
index ffb6cdb..b0c6e44 100644
--- a/libs/ui/GraphicBuffer.cpp
+++ b/libs/ui/GraphicBuffer.cpp
@@ -388,8 +388,8 @@
         }
     }
 
-    const uint64_t usage = static_cast<uint64_t>(
-            android_convertGralloc1To0Usage(inProducerUsage, inConsumerUsage));
+    const uint64_t usage = static_cast<uint64_t>(ANDROID_NATIVE_UNSIGNED_CAST(
+            android_convertGralloc1To0Usage(inProducerUsage, inConsumerUsage)));
 
     auto result = getBufferMapper().lock(handle, usage, rect, base::unique_fd{fenceFd});
 
diff --git a/libs/ui/GraphicBufferMapper.cpp b/libs/ui/GraphicBufferMapper.cpp
index b6ab2f5..7b5a27d 100644
--- a/libs/ui/GraphicBufferMapper.cpp
+++ b/libs/ui/GraphicBufferMapper.cpp
@@ -208,8 +208,10 @@
 status_t GraphicBufferMapper::lockAsync(buffer_handle_t handle, uint64_t producerUsage,
                                         uint64_t consumerUsage, const Rect& bounds, void** vaddr,
                                         int fenceFd) {
-    return lockAsync(handle, android_convertGralloc1To0Usage(producerUsage, consumerUsage), bounds,
-                     vaddr, fenceFd);
+    return lockAsync(handle,
+                     ANDROID_NATIVE_UNSIGNED_CAST(
+                             android_convertGralloc1To0Usage(producerUsage, consumerUsage)),
+                     bounds, vaddr, fenceFd);
 }
 
 status_t GraphicBufferMapper::lockAsyncYCbCr(buffer_handle_t handle, uint32_t usage,