diff --git a/src/core/chromium_gpu_helper.h b/src/core/chromium_gpu_helper.h
index e0ac8e2a3c04db7c001f80fa1f43c1f577ae464a..09ae5a77eddd9e5581ddef6360fefbadf15fd235 100644
--- a/src/core/chromium_gpu_helper.h
+++ b/src/core/chromium_gpu_helper.h
@@ -55,7 +55,7 @@ class SyncPointManager;
 namespace gpu {
 namespace gles2 {
 class MailboxManager;
-class MailboxName;
+struct MailboxName;
 class Texture;
 }
 }