diff --git a/antlr3.spec b/antlr3.spec
index 69bf07f..ebe35c6 100644
--- a/antlr3.spec
+++ b/antlr3.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package antlr3
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2019 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -172,11 +172,11 @@ sed -i 's/jsr14/1.6/' antlr3-maven-archetype/src/main/resources/archetype-resour
 %{mvn_file} :antlr-maven-plugin antlr3-maven-plugin
 
 %build
+%{mvn_build} -f \
 %if %{with bootstrap}
-%{mvn_build} -f -j
-%else
-%{mvn_build} -f
+	-j \
 %endif
+	-- -Dmaven.compiler.release=6
 
 %if %{without runtime} &&  %{without bootstrap}