diff --git a/libcxxabi/src/Unwind/Registers.hpp b/libcxxabi/src/Unwind/Registers.hpp
index a0050ddfc374..96eefd5289a2 100644
--- a/libcxxabi/src/Unwind/Registers.hpp
+++ b/libcxxabi/src/Unwind/Registers.hpp
@@ -1066,7 +1066,7 @@ inline Registers_arm64::Registers_arm64(const void *registers) {
 
 inline Registers_arm64::Registers_arm64() {
   bzero(&_registers, sizeof(_registers));
-  bzero(&_registers, sizeof(_vectorHalfRegisters));
+  bzero(&_vectorHalfRegisters, sizeof(_vectorHalfRegisters));
 }
 
 inline bool Registers_arm64::validRegister(int regNum) const {