diff --git a/gio/Gio.metadata b/gio/Gio.metadata
index 61cc95529..f3f1e9265 100644
--- a/gio/Gio.metadata
+++ b/gio/Gio.metadata
@@ -21,6 +21,9 @@
   <attr path="/api/namespace/class[@cname='GContent_']/method[@name='GetRegistered']/return-type" name="element_type">gchar*</attr>
   <attr path="/api/namespace/class[@cname='GContent_']/method[@name='GetRegistered']/return-type" name="owned">true</attr>
   <attr path="/api/namespace/class[@cname='GContent_']/method[@name='GetRegistered']/return-type" name="elements_owned">true</attr>
+  <attr path="/api/namespace/class[@cname='GIo_']" name="name">IOError</attr>
+  <attr path="/api/namespace/class[@cname='GIo_']/method[@name='ErrorFromErrno']" name="name">FromErrno</attr>
+  <attr path="/api/namespace/class[@cname='GIo_']/method[@name='ErrorFromWin32Error']" name="name">FromWin32Error</attr>
   <attr path="/api/namespace/class[@cname='GIo_']/method[@name='ModulesLoadAllInDirectory']" name="name">LoadAllInDirectory</attr>
   <attr path="/api/namespace/class[@cname='GIo_']/method[@name='LoadAllInDirectory']/return-type" name="element_type">GIOModule*</attr>
   <attr path="/api/namespace/class[@cname='GIo_']/method[@name='LoadAllInDirectory']/return-type" name="elements_owned">true</attr>
diff --git a/gio/gio.csproj b/gio/gio.csproj
index 292898056..6ff03c3bf 100644
--- a/gio/gio.csproj
+++ b/gio/gio.csproj
@@ -241,7 +241,6 @@
     <Compile Include="generated\InitableAdapter.cs" />
     <Compile Include="generated\InputStream.cs" />
     <Compile Include="generated\InputVector.cs" />
-    <Compile Include="generated\Io.cs" />
     <Compile Include="generated\LoadableIcon.cs" />
     <Compile Include="generated\LoadableIconAdapter.cs" />
     <Compile Include="generated\LocalDirectoryMonitor.cs" />
@@ -365,6 +364,7 @@
     <Compile Include="generated\ZlibCompressorFormat.cs" />
     <Compile Include="generated\ZlibDecompressor.cs" />
     <Compile Include="generated\ContentType.cs" />
+    <Compile Include="generated\IOError.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\glib\glib.csproj">