Android – style parent: Cannot resolve symbol @android:…

Hello,

I want to use a style with a parent attribute, like this:

<style name="Theme.CustomActivityTheme" parent="@android:style/Theme.Holo.Light">

        <!-- activity and action bar styles -->

</style>

But Intellij says to:

@android:style/Theme.Holo

Cannot resolve symbol '@android:style/Theme.Holo' Validates resource references inside Android XML files.

What can I do to fix this problem?

In my Manifest I have:

            android:minSdkVersion="14"

            android:targetSdkVersion="17"

I think this should actually be ok.

I use Intellij IDEA 12.1.2 and the last Version of the Android SDK

I look forward to helpful answers.