diff --git a/src/Microsoft.VisualStudio.ProjectSystem.Managed/ProjectSystem/BuildUpToDateCheck.cs b/src/Microsoft.VisualStudio.ProjectSystem.Managed/ProjectSystem/BuildUpToDateCheck.cs
index c6748d88afa..63a1d0600f9 100644
--- a/src/Microsoft.VisualStudio.ProjectSystem.Managed/ProjectSystem/BuildUpToDateCheck.cs
+++ b/src/Microsoft.VisualStudio.ProjectSystem.Managed/ProjectSystem/BuildUpToDateCheck.cs
@@ -331,6 +331,7 @@ private HashSet<string> CollectInputs(Logger logger)
             var inputs = new HashSet<string>();
 
             AddInput(logger, inputs, _msBuildProjectFullPath, "project file");
+
             AddInputs(logger, inputs, _imports, "import");
 
             foreach (var pair in _items)
diff --git a/src/Targets/Microsoft.Managed.DesignTime.targets b/src/Targets/Microsoft.Managed.DesignTime.targets
index 6c825e74dde..3847c809a49 100644
--- a/src/Targets/Microsoft.Managed.DesignTime.targets
+++ b/src/Targets/Microsoft.Managed.DesignTime.targets
@@ -25,6 +25,11 @@
     <SuppressOutOfDateMessageOnBuild Condition="'$(SuppressOutOfDateMessageOnBuild)' == ''">true</SuppressOutOfDateMessageOnBuild>
   </PropertyGroup>
 
+  <!-- If the project we're compiling has a ruleset, make sure we check it for up-to-date checks. -->
+  <ItemGroup Condition="'$(CodeAnalysisRuleSet)' != ''">
+    <UpToDateCheckInput Include="$(CodeAnalysisRuleSet)" />
+  </ItemGroup>
+
   <!--
     Locate the approriate localized xaml resources based on the language ID or name.