diff --git a/apache-commons-jxpath.spec b/apache-commons-jxpath.spec
index be4b486..c1cc559 100644
--- a/apache-commons-jxpath.spec
+++ b/apache-commons-jxpath.spec
@@ -49,7 +49,7 @@ rm src/test/org/apache/commons/jxpath/servlet/JXPathServletContextTest.java
 
 %build
 # we are skipping tests because we don't have com.mockrunner in repos yet
-%mvn_build -f
+%mvn_build -f -- -Dmaven.compiler.source=1.6 -Dmaven.compiler.target=1.6
 
 %install
 %mvn_install