et tu log4j? java.lang.classnotfoundexception: org.apache.log4j.enhancedpatternlayout

While I was setting log4j for our new project I got the following exception:

log4j:ERROR Could not instantiate class [org.apache.log4j.EnhancedPatternLayout].
java.lang.ClassNotFoundException: org.apache.log4j.EnhancedPatternLayout

I have log4j in my pom and its jar in my local repository so why EnhancedPatternLayout is missing?
This class is not in our log4j but in log4j-extras. You have to add the necessary extras jar to your pom.

        
            log4j
            apache-log4j-extras
            1.0
        

I added the version 1.0 because version 1.1 requires log4j 1.2.16 while I'm using log4j 1.2.15.