diff --git a/jakarta-activation.spec b/jakarta-activation.spec
index a8ef9dd..74ce94e 100644
--- a/jakarta-activation.spec
+++ b/jakarta-activation.spec
@@ -2,7 +2,7 @@
 
 Name:           jakarta-activation
 Version:        1.2.1
-Release:        6%{?dist}
+Release:        7%{?dist}
 Summary:        Jakarta Activation Specification and Implementation
 License:        BSD
 
@@ -56,9 +56,12 @@ This package contains javadoc for %{name}.
 # (the plugin is only used to strip off -SNAPSHOT or -Mx qualifiers)
 sed -i "s/\${activation.osgiversion}/%{version}/g" activation/pom.xml
 
+# remove maven-compiler-plugin configurations that are broken with Java 11
+%pom_remove_plugin -r :maven-compiler-plugin
+
 
 %build
-%mvn_build
+%mvn_build -- -Dmaven.compiler.source=1.8 -Dmaven.compiler.target=1.8
 
 
 %install
@@ -74,6 +77,9 @@ sed -i "s/\${activation.osgiversion}/%{version}/g" activation/pom.xml
 
 
 %changelog
+* Wed Jul 29 2020 Fabio Valentini <decathorpe@gmail.com> - 1.2.1-7
+- Override javac source / target versions with 1.8 to fix build with Java 11.
+
 * Tue Jul 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.2.1-6
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild