diff --git a/dlls/winebus.sys/bus.h b/dlls/winebus.sys/bus.h
index 67215019dfc..df53508d2c0 100644
--- a/dlls/winebus.sys/bus.h
+++ b/dlls/winebus.sys/bus.h
@@ -27,8 +27,6 @@
 
 #include "unixlib.h"
 
-struct unix_device *get_unix_device(DEVICE_OBJECT *device) DECLSPEC_HIDDEN;
-
 /* General Bus Functions */
 BOOL is_xbox_gamepad(WORD vid, WORD pid) DECLSPEC_HIDDEN;
 
diff --git a/dlls/winebus.sys/main.c b/dlls/winebus.sys/main.c
index ce548980640..3e63a84adcc 100644
--- a/dlls/winebus.sys/main.c
+++ b/dlls/winebus.sys/main.c
@@ -217,12 +217,6 @@ static void unix_device_set_feature_report(DEVICE_OBJECT *device, HID_XFER_PACKE
     winebus_call(device_set_feature_report, &params);
 }
 
-struct unix_device *get_unix_device(DEVICE_OBJECT *device)
-{
-    struct device_extension *ext = (struct device_extension *)device->DeviceExtension;
-    return ext->unix_device;
-}
-
 static DWORD get_device_index(struct device_desc *desc)
 {
     struct device_extension *ext;