diff --git a/llvm/include/llvm/ProfileData/MemProf.h b/llvm/include/llvm/ProfileData/MemProf.h
--- a/llvm/include/llvm/ProfileData/MemProf.h
+++ b/llvm/include/llvm/ProfileData/MemProf.h
@@ -138,7 +138,7 @@
   // Describes a call frame for a dynamic allocation context. The contents of
   // the frame are populated by symbolizing the stack depot call frame from the
   // compiler runtime.
-  PACKED(struct Frame {
+  struct Frame {
     // A uuid (uint64_t) identifying the function. It is obtained by
     // llvm::md5(FunctionName) which returns the lower 64 bits.
     GlobalValue::GUID Function;
@@ -194,7 +194,7 @@
       return sizeof(Frame::Function) + sizeof(Frame::LineOffset) +
              sizeof(Frame::Column) + sizeof(Frame::IsInlineFrame);
     }
-  });
+  };
 
   // The dynamic calling context for the allocation.
   std::vector<Frame> CallStack;
@@ -208,7 +208,8 @@
 
   size_t serializedSize() const {
     return sizeof(uint64_t) + // The number of frames to serialize.
-           sizeof(Frame) * CallStack.size() + // The contents of the frames.
+           Frame::serializedSize() *
+               CallStack.size() + // The contents of the frames.
            PortableMemInfoBlock::serializedSize(); // The size of the payload.
   }