diff --git a/reactos/dll/win32/fusion/fusion.c b/reactos/dll/win32/fusion/fusion.c
index 5fd1f41b932..729356208eb 100644
--- a/reactos/dll/win32/fusion/fusion.c
+++ b/reactos/dll/win32/fusion/fusion.c
@@ -38,6 +38,15 @@ HRESULT WINAPI ClearDownloadCache(void)
     return E_NOTIMPL;
 }
 
+/******************************************************************
+ *  CopyPDBs   (FUSION.@)
+ */
+HRESULT WINAPI CopyPDBs(void *unknown)
+{
+    FIXME("(%p) stub!\n", unknown);
+    return E_NOTIMPL;
+}
+
 /******************************************************************
  *  CreateInstallReferenceEnum   (FUSION.@)
  */
diff --git a/reactos/dll/win32/fusion/fusion.spec b/reactos/dll/win32/fusion/fusion.spec
index 264aff70959..f3a89507617 100644
--- a/reactos/dll/win32/fusion/fusion.spec
+++ b/reactos/dll/win32/fusion/fusion.spec
@@ -1,4 +1,4 @@
-@ stub CopyPDBs
+@ stdcall CopyPDBs(ptr)
 @ stdcall ClearDownloadCache()
 @ stdcall CreateApplicationContext(ptr ptr)
 @ stdcall CreateAssemblyCache(ptr long)
diff --git a/reactos/dll/win32/fusion/fusion_1_1/fusion.spec b/reactos/dll/win32/fusion/fusion_1_1/fusion.spec
index 264aff70959..f3a89507617 100644
--- a/reactos/dll/win32/fusion/fusion_1_1/fusion.spec
+++ b/reactos/dll/win32/fusion/fusion_1_1/fusion.spec
@@ -1,4 +1,4 @@
-@ stub CopyPDBs
+@ stdcall CopyPDBs(ptr)
 @ stdcall ClearDownloadCache()
 @ stdcall CreateApplicationContext(ptr ptr)
 @ stdcall CreateAssemblyCache(ptr long)
diff --git a/reactos/dll/win32/fusion/fusion_2_0/fusion.spec b/reactos/dll/win32/fusion/fusion_2_0/fusion.spec
index 264aff70959..f3a89507617 100644
--- a/reactos/dll/win32/fusion/fusion_2_0/fusion.spec
+++ b/reactos/dll/win32/fusion/fusion_2_0/fusion.spec
@@ -1,4 +1,4 @@
-@ stub CopyPDBs
+@ stdcall CopyPDBs(ptr)
 @ stdcall ClearDownloadCache()
 @ stdcall CreateApplicationContext(ptr ptr)
 @ stdcall CreateAssemblyCache(ptr long)
diff --git a/reactos/media/doc/README.WINE b/reactos/media/doc/README.WINE
index c48e9249d81..89dae7dcc71 100644
--- a/reactos/media/doc/README.WINE
+++ b/reactos/media/doc/README.WINE
@@ -67,7 +67,7 @@ reactos/dll/win32/dbghelp             # Synced to WineStaging-1.9.4
 reactos/dll/win32/dciman32            # Synced to WineStaging-1.7.55
 reactos/dll/win32/faultrep            # Synced to WineStaging-1.7.55
 reactos/dll/win32/fltlib              # Synced to WineStaging-1.7.55
-reactos/dll/win32/fusion              # Synced to WineStaging-1.7.55
+reactos/dll/win32/fusion              # Synced to WineStaging-1.9.4
 reactos/dll/win32/gdiplus             # Synced to WineStaging-1.7.55
 reactos/dll/win32/hhctrl.ocx          # Synced to WineStaging-1.7.55
 reactos/dll/win32/hlink               # Synced to WineStaging-1.7.55