diff --git a/libidn.spec b/libidn.spec
index 0199a13..e5ec4f3 100644
--- a/libidn.spec
+++ b/libidn.spec
@@ -148,7 +148,7 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/*.la \
 %if %{with libidn_enables_java}
 # regenerate java documentation
 rm -rf doc/java/*
-%javadoc -source 1.6 -d doc/java $(find java/src/main/java -name "*.java")
+%javadoc -d doc/java $(find java/src/main/java -name "*.java")
 # generate maven depmap
 rm -rf $RPM_BUILD_ROOT%{_javadir}/libidn*.jar
 %mvn_artifact java/pom.xml java/libidn-%{version}.jar