diff --git a/plexus-build-api.spec b/plexus-build-api.spec
index 3f36915..5ae0337 100644
--- a/plexus-build-api.spec
+++ b/plexus-build-api.spec
@@ -36,6 +36,8 @@ cp -p %{SOURCE1} .
 %patch0 -p1
 %patch1 -p1
 
+%pom_xpath_set "pom:plugin[pom:artifactId='maven-compiler-plugin']/pom:configuration/*" 1.6
+
 %mvn_file : plexus/%{name}
 
 %build