diff --git a/llvm/tools/llvm-exegesis/lib/X86/Target.cpp b/llvm/tools/llvm-exegesis/lib/X86/Target.cpp
index ac635bb8af4c..db30c1f1837d 100644
--- a/llvm/tools/llvm-exegesis/lib/X86/Target.cpp
+++ b/llvm/tools/llvm-exegesis/lib/X86/Target.cpp
@@ -628,7 +628,9 @@ class X86SavedState : public ExegesisTarget::SavedState {
   }
 
 private:
+#ifdef __x86_64__
   alignas(16) char FPState[512];
+#endif
 };
 
 class ExegesisX86Target : public ExegesisTarget {