diff --git a/src/runtime/export_windows_test.go b/src/runtime/export_windows_test.go
index 703b422ac23..f712c6f6535 100644
--- a/src/runtime/export_windows_test.go
+++ b/src/runtime/export_windows_test.go
@@ -8,10 +8,7 @@ package runtime
 
 import "unsafe"
 
-var (
-	TestingWER              = &testingWER
-	TimeBeginPeriodRetValue = &timeBeginPeriodRetValue
-)
+var TestingWER = &testingWER
 
 func NumberOfProcessors() int32 {
 	var info systeminfo
diff --git a/src/runtime/os1_windows.go b/src/runtime/os1_windows.go
index 551705797d9..90e03674a40 100644
--- a/src/runtime/os1_windows.go
+++ b/src/runtime/os1_windows.go
@@ -47,7 +47,6 @@ import (
 //go:cgo_import_dynamic runtime._WaitForSingleObject WaitForSingleObject%2 "kernel32.dll"
 //go:cgo_import_dynamic runtime._WriteConsoleW WriteConsoleW%5 "kernel32.dll"
 //go:cgo_import_dynamic runtime._WriteFile WriteFile%5 "kernel32.dll"
-//go:cgo_import_dynamic runtime._timeBeginPeriod timeBeginPeriod%1 "winmm.dll"
 
 var (
 	// Following syscalls are available on every Windows PC.
@@ -90,8 +89,7 @@ var (
 	_WSAGetOverlappedResult,
 	_WaitForSingleObject,
 	_WriteConsoleW,
-	_WriteFile,
-	_timeBeginPeriod stdFunction
+	_WriteFile stdFunction
 
 	// Following syscalls are only available on some Windows PCs.
 	// We will load syscalls, if available, before using them.
@@ -161,8 +159,6 @@ const (
 // in sys_windows_386.s and sys_windows_amd64.s
 func externalthreadhandler()
 
-var timeBeginPeriodRetValue uint32
-
 func osinit() {
 	asmstdcallAddr = unsafe.Pointer(funcPC(asmstdcall))
 
@@ -178,8 +174,6 @@ func osinit() {
 
 	stdcall2(_SetConsoleCtrlHandler, funcPC(ctrlhandler), 1)
 
-	timeBeginPeriodRetValue = uint32(stdcall1(_timeBeginPeriod, 1))
-
 	ncpu = getproccount()
 
 	// Windows dynamic priority boosting assumes that a process has different types
diff --git a/src/runtime/syscall_windows_test.go b/src/runtime/syscall_windows_test.go
index 8b9945b22dd..30630bc904f 100644
--- a/src/runtime/syscall_windows_test.go
+++ b/src/runtime/syscall_windows_test.go
@@ -642,13 +642,6 @@ uintptr_t cfunc(callback f, uintptr_t n) {
 	}
 }
 
-func TestTimeBeginPeriod(t *testing.T) {
-	const TIMERR_NOERROR = 0
-	if *runtime.TimeBeginPeriodRetValue != TIMERR_NOERROR {
-		t.Fatalf("timeBeginPeriod failed: it returned %d", *runtime.TimeBeginPeriodRetValue)
-	}
-}
-
 // removeOneCPU removes one (any) cpu from affinity mask.
 // It returns new affinity mask.
 func removeOneCPU(mask uintptr) (uintptr, error) {