diff --git a/src/runtime/sys_darwin.go b/src/runtime/sys_darwin.go
index 0f91685d6ca..9af4cf18f8d 100644
--- a/src/runtime/sys_darwin.go
+++ b/src/runtime/sys_darwin.go
@@ -156,7 +156,7 @@ func pthread_kill_trampoline()
 // mmap is used to do low-level memory allocation via mmap. Don't allow stack
 // splits, since this function (used by sysAlloc) is called in a lot of low-level
 // parts of the runtime and callers often assume it won't acquire any locks.
-// go:nosplit
+//go:nosplit
 func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (unsafe.Pointer, int) {
 	args := struct {
 		addr            unsafe.Pointer
diff --git a/src/runtime/sys_openbsd2.go b/src/runtime/sys_openbsd2.go
index 7024cfa86d2..c936fbb494a 100644
--- a/src/runtime/sys_openbsd2.go
+++ b/src/runtime/sys_openbsd2.go
@@ -45,7 +45,7 @@ func thrkill_trampoline()
 // mmap is used to do low-level memory allocation via mmap. Don't allow stack
 // splits, since this function (used by sysAlloc) is called in a lot of low-level
 // parts of the runtime and callers often assume it won't acquire any locks.
-// go:nosplit
+//go:nosplit
 func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (unsafe.Pointer, int) {
 	args := struct {
 		addr            unsafe.Pointer