diff --git a/src/d3d9/d3d9_adapter.cpp b/src/d3d9/d3d9_adapter.cpp
index 2cab599c..80941fe4 100644
--- a/src/d3d9/d3d9_adapter.cpp
+++ b/src/d3d9/d3d9_adapter.cpp
@@ -90,8 +90,10 @@ namespace dxvk {
           D3D9Format AdapterFormat,
           D3D9Format BackBufferFormat,
           BOOL       bWindowed) {
-    if (!IsSupportedBackBufferFormat(
-      AdapterFormat, BackBufferFormat, bWindowed))
+    if (!IsSupportedAdapterFormat(AdapterFormat, bWindowed))
+      return D3DERR_NOTAVAILABLE;
+
+    if (!IsSupportedBackBufferFormat(BackBufferFormat, bWindowed))
       return D3DERR_NOTAVAILABLE;
 
     return D3D_OK;
diff --git a/src/d3d9/d3d9_monitor.cpp b/src/d3d9/d3d9_monitor.cpp
index 9d9812ab..559dea26 100644
--- a/src/d3d9/d3d9_monitor.cpp
+++ b/src/d3d9/d3d9_monitor.cpp
@@ -35,19 +35,6 @@ namespace dxvk {
   }
 
 
-  bool IsSupportedBackBufferFormat(
-          D3D9Format AdapterFormat,
-          D3D9Format BackBufferFormat,
-          BOOL       Windowed) {
-    if (!IsSupportedAdapterFormat(AdapterFormat, Windowed))
-      return false;
-
-    return AdapterFormat == BackBufferFormat
-        || (AdapterFormat == D3D9Format::X8R8G8B8 && BackBufferFormat == D3D9Format::A8R8G8B8)
-        || (AdapterFormat == D3D9Format::X1R5G5B5 && BackBufferFormat == D3D9Format::A1R5G5B5);
-  }
-
-
   bool IsSupportedBackBufferFormat(
           D3D9Format BackBufferFormat,
           BOOL       Windowed) {
diff --git a/src/d3d9/d3d9_monitor.h b/src/d3d9/d3d9_monitor.h
index 3f4f450c..8c187513 100644
--- a/src/d3d9/d3d9_monitor.h
+++ b/src/d3d9/d3d9_monitor.h
@@ -26,11 +26,6 @@ namespace dxvk {
           D3D9Format Format,
           BOOL       Windowed);
 
-  bool IsSupportedBackBufferFormat(
-          D3D9Format AdapterFormat,
-          D3D9Format BackBufferFormat,
-          BOOL       Windowed);
-
   bool IsSupportedBackBufferFormat(
           D3D9Format BackBufferFormat,
           BOOL       Windowed);