diff --git a/windows/syscall_windows.go b/windows/syscall_windows.go
index a49853e..41cb3c0 100644
--- a/windows/syscall_windows.go
+++ b/windows/syscall_windows.go
@@ -10,7 +10,6 @@
 	errorspkg "errors"
 	"fmt"
 	"runtime"
-	"strings"
 	"sync"
 	"syscall"
 	"time"
@@ -87,22 +86,13 @@
 // s, with a terminating NUL added. If s contains a NUL byte at any
 // location, it returns (nil, syscall.EINVAL).
 func UTF16FromString(s string) ([]uint16, error) {
-	if strings.IndexByte(s, 0) != -1 {
-		return nil, syscall.EINVAL
-	}
-	return utf16.Encode([]rune(s + "\x00")), nil
+	return syscall.UTF16FromString(s)
 }
 
 // UTF16ToString returns the UTF-8 encoding of the UTF-16 sequence s,
 // with a terminating NUL and any bytes after the NUL removed.
 func UTF16ToString(s []uint16) string {
-	for i, v := range s {
-		if v == 0 {
-			s = s[:i]
-			break
-		}
-	}
-	return string(utf16.Decode(s))
+	return syscall.UTF16ToString(s)
 }
 
 // StringToUTF16Ptr is deprecated. Use UTF16PtrFromString instead.