diff --git a/src/runtime/mbitmap.go b/src/runtime/mbitmap.go
index f025ce1c68..e8eb6a7e22 100644
--- a/src/runtime/mbitmap.go
+++ b/src/runtime/mbitmap.go
@@ -86,6 +86,7 @@ const (
 
 // addb returns the byte pointer p+n.
 //go:nowritebarrier
+//go:nosplit
 func addb(p *byte, n uintptr) *byte {
 	// Note: wrote out full expression instead of calling add(p, n)
 	// to reduce the number of temporaries generated by the
@@ -95,6 +96,7 @@ func addb(p *byte, n uintptr) *byte {
 
 // subtractb returns the byte pointer p-n.
 //go:nowritebarrier
+//go:nosplit
 func subtractb(p *byte, n uintptr) *byte {
 	// Note: wrote out full expression instead of calling add(p, -n)
 	// to reduce the number of temporaries generated by the
@@ -104,6 +106,7 @@ func subtractb(p *byte, n uintptr) *byte {
 
 // add1 returns the byte pointer p+1.
 //go:nowritebarrier
+//go:nosplit
 func add1(p *byte) *byte {
 	// Note: wrote out full expression instead of calling addb(p, 1)
 	// to reduce the number of temporaries generated by the