diff --git a/wcferry/client.go b/wcferry/client.go
index 579c66e..fba2dea 100644
--- a/wcferry/client.go
+++ b/wcferry/client.go
@@ -2,12 +2,8 @@ package wcferry
 
 import (
 	"errors"
-	"runtime"
-	"syscall"
 	"time"
 
-	"github.com/opentdp/go-helper/filer"
-	"github.com/opentdp/go-helper/logman"
 	"github.com/opentdp/go-helper/onquit"
 )
 
@@ -92,40 +88,3 @@ func (c *Client) wxInitSDK() error {
 func (c *Client) wxDestroySDK() error {
 	return c.sdkCall("WxDestroySDK")
 }
-
-// 调用 sdk.dll 中的函数
-// return error 错误信息
-func (c *Client) sdkCall(fn string, a ...uintptr) error {
-	dll := c.SdkLibrary
-	if dll == "" || runtime.GOOS != "windows" {
-		logman.Warn("skip to load sdk.dll")
-		return nil
-	}
-	// 查找 sdk.dll
-	if !filer.Exists(dll) {
-		dll = "wcferry/" + dll
-		if !filer.Exists(dll) {
-			return errors.New(dll + " not found")
-		}
-	}
-	// 加载 sdk.dll
-	sdk, err := syscall.LoadDLL(dll)
-	if err != nil {
-		logman.Warn("failed to load sdk.dll", "error", err)
-		return err
-	}
-	defer sdk.Release()
-	// 查找 fn 函数
-	proc, err := sdk.FindProc(fn)
-	if err != nil {
-		logman.Warn("failed to call "+fn, "error", err)
-		return err
-	}
-	// 执行 fn(a...)
-	r1, r2, err := proc.Call(a...)
-	logman.Warn("call dll:"+fn, "r1", r1, "r2", r2, "error", err)
-	if err.Error() == "Attempt to access invalid address." {
-		err = nil // 忽略已知问题
-	}
-	return err
-}
diff --git a/wcferry/client_linux.go b/wcferry/client_linux.go
new file mode 100644
index 0000000..ea5cf80
--- /dev/null
+++ b/wcferry/client_linux.go
@@ -0,0 +1,14 @@
+//go:build !windows
+
+package wcferry
+
+import (
+	"github.com/opentdp/go-helper/logman"
+)
+
+// 调用 sdk.dll 中的函数
+// return error 错误信息
+func (c *Client) sdkCall(fn string, a ...uintptr) error {
+	logman.Warn("skip to load sdk.dll", "fn", fn, "a", a)
+	return nil
+}
diff --git a/wcferry/client_windows.go b/wcferry/client_windows.go
new file mode 100644
index 0000000..b645181
--- /dev/null
+++ b/wcferry/client_windows.go
@@ -0,0 +1,48 @@
+//go:build windows
+
+package wcferry
+
+import (
+	"errors"
+	"syscall"
+
+	"github.com/opentdp/go-helper/filer"
+	"github.com/opentdp/go-helper/logman"
+)
+
+// 调用 sdk.dll 中的函数
+// return error 错误信息
+func (c *Client) sdkCall(fn string, a ...uintptr) error {
+	if c.SdkLibrary == "" {
+		logman.Warn("skip to load sdk.dll")
+		return nil
+	}
+	// 查找 sdk.dll
+	dll := c.SdkLibrary
+	if !filer.Exists(dll) {
+		dll = "wcferry/" + dll
+		if !filer.Exists(dll) {
+			return errors.New(dll + " not found")
+		}
+	}
+	// 加载 sdk.dll
+	sdk, err := syscall.LoadDLL(dll)
+	if err != nil {
+		logman.Warn("failed to load sdk.dll", "error", err)
+		return err
+	}
+	defer sdk.Release()
+	// 查找 fn 函数
+	proc, err := sdk.FindProc(fn)
+	if err != nil {
+		logman.Warn("failed to call "+fn, "error", err)
+		return err
+	}
+	// 执行 fn(a...)
+	r1, r2, err := proc.Call(a...)
+	logman.Warn("call dll:"+fn, "r1", r1, "r2", r2, "error", err)
+	if err.Error() == "Attempt to access invalid address." {
+		err = nil // 忽略已知问题
+	}
+	return err
+}