diff --git a/Utilities/Thread.cpp b/Utilities/Thread.cpp
index 0bb5ece45a..bb41b1e83e 100644
--- a/Utilities/Thread.cpp
+++ b/Utilities/Thread.cpp
@@ -465,7 +465,7 @@ typedef ucontext_t x64_context;
 
 #define X64REG(context, reg) (darwin_x64reg(context, reg))
 #define XMMREG(context, reg) (reinterpret_cast<u128*>(&(context)->uc_mcontext->__fs.__fpu_xmm0[reg]))
-#define EFLAGS(context) ((context)->uc_mcontext->__ss.__eflags)
+#define EFLAGS(context) ((context)->uc_mcontext->__ss.__rflags)
 
 uint64_t* darwin_x64reg(x64_context *context, int reg)
 {