diff --git a/dlls/d3d8/device.c b/dlls/d3d8/device.c
index 455c76415c6..e899b3402ad 100644
--- a/dlls/d3d8/device.c
+++ b/dlls/d3d8/device.c
@@ -732,6 +732,8 @@ static HRESULT WINAPI d3d8_device_GetBackBuffer(IDirect3DDevice8 *iface,
     TRACE("iface %p, backbuffer_idx %u, backbuffer_type %#x, backbuffer %p.\n",
             iface, backbuffer_idx, backbuffer_type, backbuffer);
 
+    /* backbuffer_type is ignored by native. */
+
     /* No need to check for backbuffer == NULL, Windows crashes in that case. */
     wined3d_mutex_lock();
     if (!(swapchain = wined3d_device_get_swapchain(device->wined3d_device, 0)))
@@ -741,8 +743,7 @@ static HRESULT WINAPI d3d8_device_GetBackBuffer(IDirect3DDevice8 *iface,
         return D3DERR_INVALIDCALL;
     }
 
-    if (!(wined3d_texture = wined3d_swapchain_get_back_buffer(swapchain,
-            backbuffer_idx, (enum wined3d_backbuffer_type)backbuffer_type)))
+    if (!(wined3d_texture = wined3d_swapchain_get_back_buffer(swapchain, backbuffer_idx)))
     {
         wined3d_mutex_unlock();
         *backbuffer = NULL;
diff --git a/dlls/d3d8/swapchain.c b/dlls/d3d8/swapchain.c
index 70b7fb0322e..8efdd0a5e92 100644
--- a/dlls/d3d8/swapchain.c
+++ b/dlls/d3d8/swapchain.c
@@ -120,6 +120,8 @@ static HRESULT WINAPI d3d8_swapchain_GetBackBuffer(IDirect3DSwapChain8 *iface,
     TRACE("iface %p, backbuffer_idx %u, backbuffer_type %#x, backbuffer %p.\n",
             iface, backbuffer_idx, backbuffer_type, backbuffer);
 
+    /* backbuffer_type is ignored by native. */
+
     if (!backbuffer)
     {
         WARN("The output pointer is NULL, returning D3DERR_INVALIDCALL.\n");
@@ -127,8 +129,7 @@ static HRESULT WINAPI d3d8_swapchain_GetBackBuffer(IDirect3DSwapChain8 *iface,
     }
 
     wined3d_mutex_lock();
-    if ((wined3d_texture = wined3d_swapchain_get_back_buffer(swapchain->wined3d_swapchain,
-            backbuffer_idx, (enum wined3d_backbuffer_type)backbuffer_type)))
+    if ((wined3d_texture = wined3d_swapchain_get_back_buffer(swapchain->wined3d_swapchain, backbuffer_idx)))
     {
         wined3d_resource = wined3d_texture_get_sub_resource(wined3d_texture, 0);
         surface_impl = wined3d_resource_get_parent(wined3d_resource);
diff --git a/dlls/d3d9/device.c b/dlls/d3d9/device.c
index 01a6d9e2c15..3a0376dac40 100644
--- a/dlls/d3d9/device.c
+++ b/dlls/d3d9/device.c
@@ -754,6 +754,8 @@ static HRESULT WINAPI d3d9_device_GetBackBuffer(IDirect3DDevice9Ex *iface, UINT
     TRACE("iface %p, swapchain %u, backbuffer_idx %u, backbuffer_type %#x, backbuffer %p.\n",
             iface, swapchain, backbuffer_idx, backbuffer_type, backbuffer);
 
+    /* backbuffer_type is ignored by native. */
+
     /* No need to check for backbuffer == NULL, Windows crashes in that case. */
     wined3d_mutex_lock();
 
@@ -764,8 +766,7 @@ static HRESULT WINAPI d3d9_device_GetBackBuffer(IDirect3DDevice9Ex *iface, UINT
         return D3DERR_INVALIDCALL;
     }
 
-    if (!(wined3d_texture = wined3d_swapchain_get_back_buffer(wined3d_swapchain,
-            backbuffer_idx, (enum wined3d_backbuffer_type)backbuffer_type)))
+    if (!(wined3d_texture = wined3d_swapchain_get_back_buffer(wined3d_swapchain, backbuffer_idx)))
     {
         wined3d_mutex_unlock();
         *backbuffer = NULL;
diff --git a/dlls/d3d9/swapchain.c b/dlls/d3d9/swapchain.c
index b26a4826ddb..c995afb17d1 100644
--- a/dlls/d3d9/swapchain.c
+++ b/dlls/d3d9/swapchain.c
@@ -160,6 +160,8 @@ static HRESULT WINAPI d3d9_swapchain_GetBackBuffer(IDirect3DSwapChain9Ex *iface,
     TRACE("iface %p, backbuffer_idx %u, backbuffer_type %#x, backbuffer %p.\n",
             iface, backbuffer_idx, backbuffer_type, backbuffer);
 
+    /* backbuffer_type is ignored by native. */
+
     if (!backbuffer)
     {
         WARN("The output pointer is NULL, returning D3DERR_INVALIDCALL.\n");
@@ -167,8 +169,7 @@ static HRESULT WINAPI d3d9_swapchain_GetBackBuffer(IDirect3DSwapChain9Ex *iface,
     }
 
     wined3d_mutex_lock();
-    if ((wined3d_texture = wined3d_swapchain_get_back_buffer(swapchain->wined3d_swapchain,
-            backbuffer_idx, (enum wined3d_backbuffer_type)backbuffer_type)))
+    if ((wined3d_texture = wined3d_swapchain_get_back_buffer(swapchain->wined3d_swapchain, backbuffer_idx)))
     {
         wined3d_resource = wined3d_texture_get_sub_resource(wined3d_texture, 0);
         surface_impl = wined3d_resource_get_parent(wined3d_resource);
diff --git a/dlls/dxgi/swapchain.c b/dlls/dxgi/swapchain.c
index 10ae26d1f66..366bdb98f1c 100644
--- a/dlls/dxgi/swapchain.c
+++ b/dlls/dxgi/swapchain.c
@@ -152,8 +152,7 @@ static HRESULT STDMETHODCALLTYPE dxgi_swapchain_GetBuffer(IDXGISwapChain *iface,
 
     EnterCriticalSection(&dxgi_cs);
 
-    if (!(texture = wined3d_swapchain_get_back_buffer(This->wined3d_swapchain,
-            buffer_idx, WINED3D_BACKBUFFER_TYPE_MONO)))
+    if (!(texture = wined3d_swapchain_get_back_buffer(This->wined3d_swapchain, buffer_idx)))
     {
         LeaveCriticalSection(&dxgi_cs);
         return DXGI_ERROR_INVALID_CALL;
@@ -235,8 +234,7 @@ static HRESULT STDMETHODCALLTYPE dxgi_swapchain_ResizeBuffers(IDXGISwapChain *if
     wined3d_swapchain_get_desc(swapchain->wined3d_swapchain, &wined3d_desc);
     for (i = 0; i < wined3d_desc.backbuffer_count; ++i)
     {
-        texture = wined3d_swapchain_get_back_buffer(swapchain->wined3d_swapchain,
-                i, WINED3D_BACKBUFFER_TYPE_MONO);
+        texture = wined3d_swapchain_get_back_buffer(swapchain->wined3d_swapchain, i);
         parent = wined3d_texture_get_parent(texture);
         IUnknown_AddRef(parent);
         if (IUnknown_Release(parent))
diff --git a/dlls/wined3d/swapchain.c b/dlls/wined3d/swapchain.c
index 8fb9f6aad12..b37bbb9f52d 100644
--- a/dlls/wined3d/swapchain.c
+++ b/dlls/wined3d/swapchain.c
@@ -178,10 +178,10 @@ HRESULT CDECL wined3d_swapchain_get_front_buffer_data(const struct wined3d_swapc
 }
 
 struct wined3d_texture * CDECL wined3d_swapchain_get_back_buffer(const struct wined3d_swapchain *swapchain,
-        UINT back_buffer_idx, enum wined3d_backbuffer_type type)
+        UINT back_buffer_idx)
 {
-    TRACE("swapchain %p, back_buffer_idx %u, type %#x.\n",
-            swapchain, back_buffer_idx, type);
+    TRACE("swapchain %p, back_buffer_idx %u.\n",
+            swapchain, back_buffer_idx);
 
     /* Return invalid if there is no backbuffer array, otherwise it will
      * crash when ddraw is used (there swapchain->back_buffers is always
diff --git a/include/wine/wined3d.h b/include/wine/wined3d.h
index 9c77cfe2f73..7d4e5a0f461 100644
--- a/include/wine/wined3d.h
+++ b/include/wine/wined3d.h
@@ -503,13 +503,6 @@ enum wined3d_patch_edge_style
     WINED3D_PATCH_EDGE_CONTINUOUS           = 1,
 };
 
-enum wined3d_backbuffer_type
-{
-    WINED3D_BACKBUFFER_TYPE_MONO            = 0,
-    WINED3D_BACKBUFFER_TYPE_LEFT            = 1,
-    WINED3D_BACKBUFFER_TYPE_RIGHT           = 2,
-};
-
 enum wined3d_swap_effect
 {
     WINED3D_SWAP_EFFECT_DISCARD             = 1,
@@ -2512,7 +2505,7 @@ HRESULT __cdecl wined3d_swapchain_create(struct wined3d_device *device, struct w
         void *parent, const struct wined3d_parent_ops *parent_ops, struct wined3d_swapchain **swapchain);
 ULONG __cdecl wined3d_swapchain_decref(struct wined3d_swapchain *swapchain);
 struct wined3d_texture * __cdecl wined3d_swapchain_get_back_buffer(const struct wined3d_swapchain *swapchain,
-        UINT backbuffer_idx, enum wined3d_backbuffer_type backbuffer_type);
+        UINT backbuffer_idx);
 struct wined3d_device * __cdecl wined3d_swapchain_get_device(const struct wined3d_swapchain *swapchain);
 HRESULT __cdecl wined3d_swapchain_get_display_mode(const struct wined3d_swapchain *swapchain,
         struct wined3d_display_mode *mode, enum wined3d_display_rotation *rotation);