diff --git a/libs/ui/GrallocMapper.cpp b/libs/ui/GrallocMapper.cpp
index b444871..7ee01ad 100644
--- a/libs/ui/GrallocMapper.cpp
+++ b/libs/ui/GrallocMapper.cpp
@@ -140,7 +140,7 @@
 
 int Mapper::unlock(buffer_handle_t handle) const
 {
-    int releaseFence;
+    int releaseFence = -1;
 
     Error error = kDefaultError;
     mMapper->unlock(handle,