diff --git a/src/runtime/mkpreempt.go b/src/runtime/mkpreempt.go
index 17544d6b21..08500a90d5 100644
--- a/src/runtime/mkpreempt.go
+++ b/src/runtime/mkpreempt.go
@@ -264,19 +264,6 @@ func genAMD64() {
 
 	l.save()
 
-	// Apparently, the signal handling code path in darwin kernel leaves
-	// the upper bits of Y registers in a dirty state, which causes
-	// many SSE operations (128-bit and narrower) become much slower.
-	// Clear the upper bits to get to a clean state. See issue #37174.
-	// It is safe here as Go code don't use the upper bits of Y registers.
-	p("#ifdef GOOS_darwin")
-	p("#ifndef hasAVX")
-	p("CMPB internal∕cpu·X86+const_offsetX86HasAVX(SB), $0")
-	p("JE 2(PC)")
-	p("#endif")
-	p("VZEROUPPER")
-	p("#endif")
-
 	lSSE.save()
 	p("CALL ·asyncPreempt2(SB)")
 	lSSE.restore()
diff --git a/src/runtime/preempt_amd64.s b/src/runtime/preempt_amd64.s
index 94a84fb74c..8e3ed0d7c5 100644
--- a/src/runtime/preempt_amd64.s
+++ b/src/runtime/preempt_amd64.s
@@ -27,13 +27,6 @@ TEXT ·asyncPreempt(SB),NOSPLIT|NOFRAME,$0-0
 	MOVQ R13, 88(SP)
 	MOVQ R14, 96(SP)
 	MOVQ R15, 104(SP)
-	#ifdef GOOS_darwin
-	#ifndef hasAVX
-	CMPB internal∕cpu·X86+const_offsetX86HasAVX(SB), $0
-	JE 2(PC)
-	#endif
-	VZEROUPPER
-	#endif
 	MOVUPS X0, 112(SP)
 	MOVUPS X1, 128(SP)
 	MOVUPS X2, 144(SP)