diff --git a/jzlib.spec b/jzlib.spec
index e27fc5e..9b5bd1b 100644
--- a/jzlib.spec
+++ b/jzlib.spec
@@ -37,6 +37,9 @@ Requires:       %{name} = %{version}-%{release}
 %setup -q
 %patch0
 
+%pom_xpath_set "pom:plugin[pom:artifactId='maven-compiler-plugin']/pom:configuration/pom:source" 1.6
+%pom_xpath_set "pom:plugin[pom:artifactId='maven-compiler-plugin']/pom:configuration/pom:target" 1.6
+
 # Make into OSGi bundle
 %pom_xpath_inject "pom:project" "<packaging>bundle</packaging>"
 %pom_add_plugin "org.apache.felix:maven-bundle-plugin" . "<extensions>true</extensions>"