diff --git a/base/include/hidl/MQDescriptor.h b/base/include/hidl/MQDescriptor.h
index 6a0bc25..786c1be 100644
--- a/base/include/hidl/MQDescriptor.h
+++ b/base/include/hidl/MQDescriptor.h
@@ -27,20 +27,6 @@
 namespace android {
 namespace hardware {
 
-struct GrantorDescriptor {
-    uint32_t flags __attribute__ ((aligned(4)));
-    uint32_t fdIndex __attribute__ ((aligned(4)));
-    uint32_t offset __attribute__ ((aligned(4)));
-    uint64_t extent __attribute__ ((aligned(8)));
-};
-
-static_assert(offsetof(GrantorDescriptor, flags) == 0, "wrong offset");
-static_assert(offsetof(GrantorDescriptor, fdIndex) == 4, "wrong offset");
-static_assert(offsetof(GrantorDescriptor, offset) == 8, "wrong offset");
-static_assert(offsetof(GrantorDescriptor, extent) == 16, "wrong offset");
-static_assert(sizeof(GrantorDescriptor) == 24, "wrong size");
-static_assert(__alignof(GrantorDescriptor) == 8, "wrong alignment");
-
 template <typename T, MQFlavor flavor>
 struct MQDescriptor {
     // Takes ownership of handle