diff --git a/src/Java.Interop/Java.Interop.csproj b/src/Java.Interop/Java.Interop.csproj
index 9feb34956..4306ebd16 100644
--- a/src/Java.Interop/Java.Interop.csproj
+++ b/src/Java.Interop/Java.Interop.csproj
@@ -10,7 +10,7 @@
     <OutputType>Library</OutputType>
     <RootNamespace>Java.Interop</RootNamespace>
     <AssemblyName>Java.Interop</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion Condition=" '$(TargetFrameworkVersion)' == '' ">v4.5</TargetFrameworkVersion>
     <NoWarn>1591</NoWarn>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\..\product.snk</AssemblyOriginatorKeyFile>