diff --git a/MemoryType.cpp b/MemoryType.cpp
index f685cfc..f27439b 100644
--- a/MemoryType.cpp
+++ b/MemoryType.cpp
@@ -67,7 +67,10 @@
     if (isReader) {
         out << "_hidl_err = "
             << parcelObjDeref
-            << "readBuffer(&"
+            << "readBuffer("
+            << "sizeof(*"
+            << name
+            << "), &"
             << parentName
             << ", "
             << " reinterpret_cast<const void **>("