diff --git a/src/Smdn.MSBuild.DefineConstants.NETSdkApi/Smdn.MSBuild.DefineConstants.NETSdkApi.csproj b/src/Smdn.MSBuild.DefineConstants.NETSdkApi/Smdn.MSBuild.DefineConstants.NETSdkApi.csproj
index 5392bf2eb..b48974c59 100644
--- a/src/Smdn.MSBuild.DefineConstants.NETSdkApi/Smdn.MSBuild.DefineConstants.NETSdkApi.csproj
+++ b/src/Smdn.MSBuild.DefineConstants.NETSdkApi/Smdn.MSBuild.DefineConstants.NETSdkApi.csproj
@@ -21,8 +21,6 @@ SPDX-License-Identifier: MIT
 
     <!-- suppress generating README.md by Smdn.MSBuild.ProjectAssets.Library -->
     <GeneratePackageReadmeFile>false</GeneratePackageReadmeFile>
-
-    <_SmdnProjectAssets_ImportFromLocal>true</_SmdnProjectAssets_ImportFromLocal>
   </PropertyGroup>
 
   <!-- supress recursive package reference -->