diff --git a/src/unwinder/arch/x86_64.rs b/src/unwinder/arch/x86_64.rs
index e15a229..d33e26b 100644
--- a/src/unwinder/arch/x86_64.rs
+++ b/src/unwinder/arch/x86_64.rs
@@ -77,7 +77,7 @@ pub extern "C-unwind" fn save_context() -> Context {
             mov [rax + 0x78], r15
             mov rdx, [rsp]
             mov [rax + 0x80], rdx
-            stmxcsr [rax + 0x88]
+            /* stmxcsr [rax + 0x88] */
             fnstcw [rax + 0x90]
             ret
             ",
@@ -95,7 +95,7 @@ pub unsafe extern "C" fn restore_context(ctx: &Context) -> ! {
             mov rsp, [rdi + 0x38]
 
             /* Restore callee-saved control registers */
-            ldmxcsr [rdi + 0x88]
+            /* ldmxcsr [rdi + 0x88] */
             fldcw [rdi + 0x90]
 
             /* Restore return address */