diff --git a/clang/lib/AST/ByteCode/Floating.h b/clang/lib/AST/ByteCode/Floating.h
index 659892e720abf..9561aee434d91 100644
--- a/clang/lib/AST/ByteCode/Floating.h
+++ b/clang/lib/AST/ByteCode/Floating.h
@@ -38,7 +38,7 @@ class Floating final {
     uint64_t Val = 0;
     uint64_t *Memory;
   };
-  llvm::APFloatBase::Semantics Semantics;
+  llvm::APFloatBase::Semantics Semantics{};
 
   APFloat getValue() const {
     unsigned BitWidth = bitWidth();