diff --git a/libs/vkd3d/state.c b/libs/vkd3d/state.c
index a9eb7f73..4d8fdcb3 100644
--- a/libs/vkd3d/state.c
+++ b/libs/vkd3d/state.c
@@ -110,7 +110,7 @@ static void d3d12_root_signature_cleanup(struct d3d12_root_signature *root_signa
 static ULONG STDMETHODCALLTYPE d3d12_root_signature_Release(ID3D12RootSignature *iface)
 {
     struct d3d12_root_signature *root_signature = impl_from_ID3D12RootSignature(iface);
-    unsigned int refcount = InterlockedDecrement((LONG *)&root_signature->refcount);
+    unsigned int refcount = vkd3d_atomic_decrement_u32(&root_signature->refcount);
 
     TRACE("%p decreasing refcount to %u.\n", root_signature, refcount);