diff --git a/dlls/winebus.sys/bus_iohid.c b/dlls/winebus.sys/bus_iohid.c
index d362906637a..93b3605f8d2 100644
--- a/dlls/winebus.sys/bus_iohid.c
+++ b/dlls/winebus.sys/bus_iohid.c
@@ -139,8 +139,7 @@ static void handle_IOHIDDeviceIOHIDReportCallback(void *context,
 
 static void iohid_device_destroy(struct unix_device *iface)
 {
-    struct platform_private *private = impl_from_unix_device(iface);
-    HeapFree(GetProcessHeap(), 0, private);
+    unix_device_destroy(iface);
 }
 
 static int iohid_device_compare(struct unix_device *iface, void *context)
@@ -337,9 +336,7 @@ static void handle_DeviceMatchingCallback(void *context, IOReturn result, void *
 
     TRACE("dev %p, desc %s.\n", IOHIDDevice, debugstr_device_desc(&desc));
 
-    if (!(private = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(struct platform_private))))
-        return;
-    private->unix_device.vtbl = &iohid_device_vtbl;
+    if (!(private = unix_device_create(&iohid_device_vtbl, sizeof(struct platform_private)))) return;
     private->device = IOHIDDevice;
     private->buffer = NULL;
 
diff --git a/dlls/winebus.sys/bus_sdl.c b/dlls/winebus.sys/bus_sdl.c
index 73562fec14f..cda9e9bdcd9 100644
--- a/dlls/winebus.sys/bus_sdl.c
+++ b/dlls/winebus.sys/bus_sdl.c
@@ -480,9 +480,7 @@ failed:
 
 static void sdl_device_destroy(struct unix_device *iface)
 {
-    struct platform_private *ext = impl_from_unix_device(iface);
-
-    HeapFree(GetProcessHeap(), 0, ext);
+    unix_device_destroy(iface);
 }
 
 static int sdl_device_compare(struct unix_device *iface, void *context)
@@ -761,9 +759,7 @@ static void sdl_add_device(unsigned int index)
 
     TRACE("%s id %d, desc %s.\n", controller ? "controller" : "joystick", id, debugstr_device_desc(&desc));
 
-    if (!(private = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*private))))
-        return;
-    private->unix_device.vtbl = &sdl_device_vtbl;
+    if (!(private = unix_device_create(&sdl_device_vtbl, sizeof(struct platform_private)))) return;
     private->sdl_joystick = joystick;
     private->sdl_controller = controller;
     private->id = id;
diff --git a/dlls/winebus.sys/bus_udev.c b/dlls/winebus.sys/bus_udev.c
index 25a408489a4..004bbb379c4 100644
--- a/dlls/winebus.sys/bus_udev.c
+++ b/dlls/winebus.sys/bus_udev.c
@@ -561,7 +561,7 @@ static void hidraw_device_destroy(struct unix_device *iface)
     close(private->device_fd);
     udev_device_unref(private->udev_device);
 
-    HeapFree(GetProcessHeap(), 0, private);
+    unix_device_destroy(iface);
 }
 
 static int udev_device_compare(struct unix_device *iface, void *platform_dev)
@@ -815,7 +815,7 @@ static void lnxev_device_destroy(struct unix_device *iface)
     close(ext->base.device_fd);
     udev_device_unref(ext->base.udev_device);
 
-    HeapFree(GetProcessHeap(), 0, ext);
+    unix_device_destroy(iface);
 }
 
 static DWORD CALLBACK lnxev_device_report_thread(void *args);
@@ -1084,9 +1084,7 @@ static void udev_add_device(struct udev_device *dev)
 
     if (strcmp(subsystem, "hidraw") == 0)
     {
-        if (!(private = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(struct platform_private))))
-            return;
-        private->unix_device.vtbl = &hidraw_device_vtbl;
+        if (!(private = unix_device_create(&hidraw_device_vtbl, sizeof(struct platform_private)))) return;
         EnterCriticalSection(&udev_cs);
         list_add_tail(&device_list, &private->unix_device.entry);
         LeaveCriticalSection(&udev_cs);
@@ -1098,9 +1096,7 @@ static void udev_add_device(struct udev_device *dev)
 #ifdef HAS_PROPER_INPUT_HEADER
     else if (strcmp(subsystem, "input") == 0)
     {
-        if (!(private = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(struct wine_input_private))))
-            return;
-        private->unix_device.vtbl = &lnxev_device_vtbl;
+        if (!(private = unix_device_create(&lnxev_device_vtbl, sizeof(struct wine_input_private)))) return;
         EnterCriticalSection(&udev_cs);
         list_add_tail(&device_list, &private->unix_device.entry);
         LeaveCriticalSection(&udev_cs);
diff --git a/dlls/winebus.sys/unix_private.h b/dlls/winebus.sys/unix_private.h
index 2a878cdb583..3b0375bb761 100644
--- a/dlls/winebus.sys/unix_private.h
+++ b/dlls/winebus.sys/unix_private.h
@@ -47,6 +47,9 @@ struct unix_device
     struct list entry;
 };
 
+extern void *unix_device_create(const struct unix_device_vtbl *vtbl, SIZE_T size) DECLSPEC_HIDDEN;
+extern void unix_device_destroy(struct unix_device *iface) DECLSPEC_HIDDEN;
+
 extern NTSTATUS sdl_bus_init(void *) DECLSPEC_HIDDEN;
 extern NTSTATUS sdl_bus_wait(void *) DECLSPEC_HIDDEN;
 extern NTSTATUS sdl_bus_stop(void *) DECLSPEC_HIDDEN;
diff --git a/dlls/winebus.sys/unixlib.c b/dlls/winebus.sys/unixlib.c
index 2407a2af468..b37d9534540 100644
--- a/dlls/winebus.sys/unixlib.c
+++ b/dlls/winebus.sys/unixlib.c
@@ -213,6 +213,21 @@ static NTSTATUS keyboard_device_create(void *args)
     return STATUS_SUCCESS;
 }
 
+void *unix_device_create(const struct unix_device_vtbl *vtbl, SIZE_T size)
+{
+    struct unix_device *iface;
+
+    if (!(iface = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size))) return NULL;
+    iface->vtbl = vtbl;
+
+    return iface;
+}
+
+void unix_device_destroy(struct unix_device *iface)
+{
+    HeapFree(GetProcessHeap(), 0, iface);
+}
+
 static NTSTATUS unix_device_remove(void *args)
 {
     struct unix_device *iface = args;