diff --git a/Directory.Build.props b/Directory.Build.props
index 309ffac1..6181f6d8 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -2,4 +2,12 @@
   <PropertyGroup>
     <EnableMSTestRunner>true</EnableMSTestRunner>
   </PropertyGroup>
+
+  <ItemGroup>
+    <!-- The SDK supplies Microsoft.SourceLink.Common and the git tasks, which is enough to find the
+         repository but not to turn its URL into fetchable source URLs. Without a host provider every
+         project warns that the generated source link is empty and ships PDBs that cannot locate their
+         sources. -->
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="10.0.301" PrivateAssets="All" />
+  </ItemGroup>
 </Project>