diff --git a/src/OpenIddict.AspNetCore/OpenIddict.AspNetCore.csproj b/src/OpenIddict.AspNetCore/OpenIddict.AspNetCore.csproj
index 2387367f..7d595c77 100644
--- a/src/OpenIddict.AspNetCore/OpenIddict.AspNetCore.csproj
+++ b/src/OpenIddict.AspNetCore/OpenIddict.AspNetCore.csproj
@@ -19,4 +19,10 @@
     <ProjectReference Include="..\OpenIddict.Validation.DataProtection\OpenIddict.Validation.DataProtection.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Include="_._" Pack="true" PackagePath="lib\net461\_._" />
+    <None Include="_._" Pack="true" PackagePath="lib\netcoreapp2.1\_._" />
+    <None Include="_._" Pack="true" PackagePath="lib\netcoreapp3.1\_._" />
+  </ItemGroup>
+
 </Project>
diff --git a/src/OpenIddict.AspNetCore/_._ b/src/OpenIddict.AspNetCore/_._
new file mode 100644
index 00000000..5f282702
--- /dev/null
+++ b/src/OpenIddict.AspNetCore/_._
@@ -0,0 +1 @@
+
\ No newline at end of file
diff --git a/src/OpenIddict.Owin/OpenIddict.Owin.csproj b/src/OpenIddict.Owin/OpenIddict.Owin.csproj
index c8ae4e33..69d8934b 100644
--- a/src/OpenIddict.Owin/OpenIddict.Owin.csproj
+++ b/src/OpenIddict.Owin/OpenIddict.Owin.csproj
@@ -17,4 +17,8 @@
     <ProjectReference Include="..\OpenIddict.Validation.Owin\OpenIddict.Validation.Owin.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Include="_._" Pack="true" PackagePath="lib\net461\_._" />
+  </ItemGroup>
+
 </Project>
diff --git a/src/OpenIddict.Owin/_._ b/src/OpenIddict.Owin/_._
new file mode 100644
index 00000000..5f282702
--- /dev/null
+++ b/src/OpenIddict.Owin/_._
@@ -0,0 +1 @@
+
\ No newline at end of file
diff --git a/src/OpenIddict/OpenIddict.csproj b/src/OpenIddict/OpenIddict.csproj
index eb913676..7fcc5d74 100644
--- a/src/OpenIddict/OpenIddict.csproj
+++ b/src/OpenIddict/OpenIddict.csproj
@@ -22,4 +22,12 @@ To use these features on ASP.NET Core or OWIN/Katana/ASP.NET 4.x, reference the
     <ProjectReference Include="..\OpenIddict.Validation.SystemNetHttp\OpenIddict.Validation.SystemNetHttp.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Include="_._" Pack="true" PackagePath="lib\net461\_._" />
+    <None Include="_._" Pack="true" PackagePath="lib\netcoreapp2.1\_._" />
+    <None Include="_._" Pack="true" PackagePath="lib\netcoreapp3.1\_._" />
+    <None Include="_._" Pack="true" PackagePath="lib\netstandard2.0\_._" />
+    <None Include="_._" Pack="true" PackagePath="lib\netstandard2.1\_._" />
+  </ItemGroup>
+
 </Project>
diff --git a/src/OpenIddict/_._ b/src/OpenIddict/_._
new file mode 100644
index 00000000..5f282702
--- /dev/null
+++ b/src/OpenIddict/_._
@@ -0,0 +1 @@
+
\ No newline at end of file