diff --git a/wine/installwine b/wine/installwine
index 1b4eb744dc201ca70b43dea76ab80305628201dc..d0fb32efb103703a07697457163e5ef1bf1b76e1 100755
--- a/wine/installwine
+++ b/wine/installwine
@@ -230,7 +230,11 @@ class DownloadThread(QtCore.QThread):
             # 文件下载
             timeout = 0
             f = requests.get(self.fileUrl, stream=True)
-            allSize = int(f.headers["content-length"])  # 文件总大小
+            if "content-length" in f.headers:
+                progressable = True # 大小已知，可使用进度条
+                allSize = int(f.headers["content-length"])  # 文件总大小
+            else:
+                progressable = False
             bytesRead = 0
             with open(savePath, "wb") as filePart:
                 for chunk in f.iter_content(chunk_size=1024):
@@ -238,7 +242,8 @@ class DownloadThread(QtCore.QThread):
                         #progressbar.update(int(part / show))
                         filePart.write(chunk)
                         bytesRead += 1024
-                        self.ChangeDialog.emit(self.dialog, int(bytesRead / allSize * 100), int(bytesRead / 1024 / 1024), int(allSize / 1024 / 1024))
+                        if progressable:
+                            self.ChangeDialog.emit(self.dialog, int(bytesRead / allSize * 100), int(bytesRead / 1024 / 1024), int(allSize / 1024 / 1024))
             # 写入配置文件
             rfile = open(f"{programPath}/winelist.json", "r")
             list = json.loads(rfile.read())
@@ -413,4 +418,4 @@ if __name__ == "__main__":
     # 图标
     ui.centralWidget.setWindowIcon(QtGui.QIcon(f"{programPath}/../deepin-wine-runner.svg"))
 
-    app.exec_()
\ No newline at end of file
+    app.exec_()