diff --git a/dlls/d3d9/d3d9_private.h b/dlls/d3d9/d3d9_private.h
index 042a394501c..cbe5d808879 100644
--- a/dlls/d3d9/d3d9_private.h
+++ b/dlls/d3d9/d3d9_private.h
@@ -563,8 +563,4 @@ typedef struct IDirect3DQuery9Impl {
     LPDIRECT3DDEVICE9EX    parentDevice;
 } IDirect3DQuery9Impl;
 
-
-/* Callbacks */
-extern ULONG WINAPI D3D9CB_DestroySwapChain (IWineD3DSwapChain *pSwapChain) DECLSPEC_HIDDEN;
-
 #endif /* __WINE_D3D9_PRIVATE_H */
diff --git a/dlls/d3d9/device.c b/dlls/d3d9/device.c
index 653395ee283..1151d990ab6 100644
--- a/dlls/d3d9/device.c
+++ b/dlls/d3d9/device.c
@@ -181,6 +181,17 @@ static UINT vertex_count_from_primitive_count(D3DPRIMITIVETYPE primitive_type, U
     }
 }
 
+static ULONG WINAPI D3D9CB_DestroySwapChain(IWineD3DSwapChain *swapchain)
+{
+    IDirect3DSwapChain9Impl *parent;
+
+    TRACE("swapchain %p.\n", swapchain);
+
+    IWineD3DSwapChain_GetParent(swapchain, (IUnknown **)&parent);
+    parent->isImplicit = FALSE;
+    return IDirect3DSwapChain9_Release((IDirect3DSwapChain9 *)parent);
+}
+
 /* IDirect3D IUnknown parts follow: */
 static HRESULT WINAPI IDirect3DDevice9Impl_QueryInterface(LPDIRECT3DDEVICE9EX iface, REFIID riid, LPVOID* ppobj) {
     IDirect3DDevice9Impl *This = (IDirect3DDevice9Impl *)iface;
diff --git a/dlls/d3d9/directx.c b/dlls/d3d9/directx.c
index 18c9955eab5..939538158a7 100644
--- a/dlls/d3d9/directx.c
+++ b/dlls/d3d9/directx.c
@@ -407,16 +407,6 @@ static HMONITOR WINAPI IDirect3D9Impl_GetAdapterMonitor(LPDIRECT3D9EX iface, UIN
     return ret;
 }
 
-ULONG WINAPI D3D9CB_DestroySwapChain(IWineD3DSwapChain *pSwapChain) {
-    IDirect3DSwapChain9Impl* swapChainParent;
-    TRACE("(%p) call back\n", pSwapChain);
-
-    IWineD3DSwapChain_GetParent(pSwapChain,(IUnknown **) &swapChainParent);
-    swapChainParent->isImplicit = FALSE;
-    /* Swap chain had refcount of 0 GetParent addrefed to 1, so 1 Release is enough */
-    return IDirect3DSwapChain9_Release((IDirect3DSwapChain9*) swapChainParent);
-}
-
 static HRESULT WINAPI DECLSPEC_HOTPATCH IDirect3D9Impl_CreateDevice(IDirect3D9Ex *iface, UINT adapter,
         D3DDEVTYPE device_type, HWND focus_window, DWORD flags, D3DPRESENT_PARAMETERS *parameters,
         IDirect3DDevice9 **device)