diff --git a/apache-commons-lang.spec b/apache-commons-lang.spec
index 2748afd..2843ca3 100644
--- a/apache-commons-lang.spec
+++ b/apache-commons-lang.spec
@@ -43,6 +43,8 @@ sed -i 's/\r//' *.txt *.html
 %pom_add_plugin org.apache.maven.plugins:maven-javadoc-plugin . "
     <configuration><source>1.3</source></configuration>"
 
+# this package needs to be compiled with -source 1.3 option
+%mvn_config buildSettings/compilerSource 1.3
 
 %mvn_file  : %{name} %{short_name}
 %mvn_alias : org.apache.commons: %{base_name}:%{base_name}