diff --git a/reactos/dll/directx/d3d8/d3d8.c b/reactos/dll/directx/d3d8/d3d8.c
index bcaec14f40d..a0c64966c0a 100644
--- a/reactos/dll/directx/d3d8/d3d8.c
+++ b/reactos/dll/directx/d3d8/d3d8.c
@@ -3,24 +3,31 @@
 
 #include <debug.h>
 
-HRESULT DLLAPI ValidatePixelShader(void)
+HRESULT WINAPI ValidatePixelShader(DWORD* pixelshader, DWORD* reserved1, BOOL bool, DWORD* toto)
 {
     UNIMPLEMENTED
     return 0;
 }
 
-HRESULT DLLAPI ValidateVertexShader(void)
-{
-    UNIMPLEMENTED
-    return 0;
-}
-HRESULT DLLAPI DebugSetMute(DWORD dw1)
+HRESULT WINAPI ValidateVertexShader(DWORD* vertexshader, DWORD* reserved1, DWORD* reserved2, BOOL bool, DWORD* toto)
 {
     UNIMPLEMENTED
     return 0;
 }
 
-DWORD DLLAPI Direct3DCreate8( UINT SDKVersion )
+HRESULT WINAPI D3D8GetSWInfo(void)
+{
+    UNIMPLEMENTED
+    return 0;
+}
+
+HRESULT WINAPI DebugSetMute(void)
+{
+    UNIMPLEMENTED
+    return 0;
+}
+
+DWORD WINAPI Direct3DCreate8( UINT SDKVersion )
 {
     UNIMPLEMENTED
     return 0;
diff --git a/reactos/dll/directx/d3d8/d3d8.def b/reactos/dll/directx/d3d8/d3d8.def
deleted file mode 100644
index c32c183573f..00000000000
--- a/reactos/dll/directx/d3d8/d3d8.def
+++ /dev/null
@@ -1,6 +0,0 @@
-LIBRARY d3d8
-EXPORTS
-	ValidatePixelShader
-	ValidateVertexShader
-	DebugSetMute
-	Direct3DCreate8
diff --git a/reactos/dll/directx/d3d8/d3d8.rbuild b/reactos/dll/directx/d3d8/d3d8.rbuild
index 0bf477d53b2..274ccb7c1b4 100644
--- a/reactos/dll/directx/d3d8/d3d8.rbuild
+++ b/reactos/dll/directx/d3d8/d3d8.rbuild
@@ -1,7 +1,8 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../../tools/rbuild/project.dtd">
 <module name="d3d8" type="win32dll" entrypoint="0" installbase="system32" installname="d3d8.dll">
-	<importlibrary definition="d3d8.def" />
+	<importlibrary definition="d3d8.spec.def" />
 	<file>d3d8.c</file>
 	<file>d3d8.rc</file>
+	<file>d3d8.spec</file>
 </module>
diff --git a/reactos/dll/directx/d3d8/d3d8.spec b/reactos/dll/directx/d3d8/d3d8.spec
new file mode 100644
index 00000000000..446778e60d4
--- /dev/null
+++ b/reactos/dll/directx/d3d8/d3d8.spec
@@ -0,0 +1,5 @@
+@ stdcall D3D8GetSWInfo()
+@ stdcall DebugSetMute()
+@ stdcall Direct3DCreate8(long)
+@ stdcall ValidatePixelShader(ptr long long ptr)
+@ stdcall ValidateVertexShader(ptr ptr ptr long ptr)
\ No newline at end of file