diff --git a/libs/vkd3d/raytracing_pipeline.c b/libs/vkd3d/raytracing_pipeline.c
index 04cf8db4..00305e39 100644
--- a/libs/vkd3d/raytracing_pipeline.c
+++ b/libs/vkd3d/raytracing_pipeline.c
@@ -20,11 +20,6 @@
 #include "vkd3d_private.h"
 #include "vkd3d_string.h"
 
-struct d3d12_state_object *impl_from_ID3D12StateObject(ID3D12StateObject *iface)
-{
-    return CONTAINING_RECORD(iface, struct d3d12_state_object, ID3D12StateObject_iface);
-}
-
 static inline struct d3d12_state_object *impl_from_ID3D12StateObjectProperties(ID3D12StateObjectProperties *iface)
 {
     return CONTAINING_RECORD(iface, struct d3d12_state_object, ID3D12StateObjectProperties_iface);
diff --git a/libs/vkd3d/vkd3d_private.h b/libs/vkd3d/vkd3d_private.h
index 42af8418..4d25735c 100644
--- a/libs/vkd3d/vkd3d_private.h
+++ b/libs/vkd3d/vkd3d_private.h
@@ -2993,7 +2993,11 @@ struct d3d12_state_object
 
 HRESULT d3d12_state_object_create(struct d3d12_device *device, const D3D12_STATE_OBJECT_DESC *desc,
         struct d3d12_state_object **object);
-struct d3d12_state_object *impl_from_ID3D12StateObject(ID3D12StateObject *iface);
+
+static inline struct d3d12_state_object *impl_from_ID3D12StateObject(ID3D12StateObject *iface)
+{
+    return CONTAINING_RECORD(iface, struct d3d12_state_object, ID3D12StateObject_iface);
+}
 
 /* utils */
 enum vkd3d_format_type