diff --git a/src/runtime/preempt.go b/src/runtime/preempt.go
index d6cdf1b..cfec196 100644
--- a/src/runtime/preempt.go
+++ b/src/runtime/preempt.go
@@ -55,7 +55,7 @@
 import (
 	"internal/abi"
 	"runtime/internal/atomic"
-	"runtime/internal/sys"
+	"internal/goarch"
 	"unsafe"
 )
 
@@ -321,7 +321,7 @@
 	f = findfunc(abi.FuncPCABIInternal(asyncPreempt2))
 	total += funcMaxSPDelta(f)
 	// Add some overhead for return PCs, etc.
-	asyncPreemptStack = uintptr(total) + 8*sys.PtrSize
+	asyncPreemptStack = uintptr(total) + 8*goarch.PtrSize
 	if asyncPreemptStack > _StackLimit {
 		// We need more than the nosplit limit. This isn't
 		// unsafe, but it may limit asynchronous preemption.