diff --git a/clang/include/clang/Basic/LangOptions.h b/clang/include/clang/Basic/LangOptions.h
index 31e8af4589b4..f1601aaa9d39 100644
--- a/clang/include/clang/Basic/LangOptions.h
+++ b/clang/include/clang/Basic/LangOptions.h
@@ -475,7 +475,7 @@ public:
 /// The is implemented as a value of the new FPOptions plus a mask showing which
 /// fields are actually set in it.
 class FPOptionsOverride {
-  FPOptions Options;
+  FPOptions Options = FPOptions(0);
   FPOptions::storage_type OverrideMask = 0;
 
 public:
diff --git a/clang/test/PCH/determinism.cpp b/clang/test/PCH/determinism.cpp
index 540088e2c91b..ea52971e3b26 100644
--- a/clang/test/PCH/determinism.cpp
+++ b/clang/test/PCH/determinism.cpp
@@ -6,6 +6,10 @@
 // RUN: cmp %t/a.pch %t/b.pch
 
 #pragma float_control(push)
+double fp_control_0(double x) {
+  return -x + x;
+}
+
 double fp_control_1(double x) {
 #pragma float_control(precise, on)
   return -x + x;