diff --git a/src/Framework/Sdk/SdkResolver.cs b/src/Framework/Sdk/SdkResolver.cs
index 28dd9be8259..fc9c7f3ed2f 100644
--- a/src/Framework/Sdk/SdkResolver.cs
+++ b/src/Framework/Sdk/SdkResolver.cs
@@ -31,10 +31,9 @@ public abstract class SdkResolver
         /// applicable for a particular <see cref="SdkReference"/>.
         /// </returns>
         /// <remarks>
-        ///  Note: You must use <see cref="SdkResultFactory"/> to return a result.
-        ///  </remarks>
-        ///
-        public abstract SdkResult Resolve(SdkReference sdkReference,
+        /// Note: You must use <see cref="SdkResultFactory"/> to return a result.
+        /// </remarks>
+        public abstract SdkResult? Resolve(SdkReference sdkReference,
                                           SdkResolverContext resolverContext,
                                           SdkResultFactory factory);
     }