diff --git a/llvm/include/llvm/BinaryFormat/Wasm.h b/llvm/include/llvm/BinaryFormat/Wasm.h
index 48847002c82a..506cd0393e9a 100644
--- a/llvm/include/llvm/BinaryFormat/Wasm.h
+++ b/llvm/include/llvm/BinaryFormat/Wasm.h
@@ -91,8 +91,8 @@ struct WasmLocalDecl {
 struct WasmFunction {
   std::vector<WasmLocalDecl> Locals;
   ArrayRef<uint8_t> Body;
-  size_t CodeSectionOffset;
-  size_t Size;
+  uint32_t CodeSectionOffset;
+  uint32_t Size;
 };
 
 struct WasmDataSegment {