diff --git a/eclipse-jgit.changes b/eclipse-jgit.changes
index abcce85..0837a8c 100644
--- a/eclipse-jgit.changes
+++ b/eclipse-jgit.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Mar 29 14:06:34 UTC 2022 - Fridrich Strba <fstrba@suse.com>
+
+- Force building with Java 11, since tycho is not knowing about any
+  Java >= 15
+
 -------------------------------------------------------------------
 Fri Jul 30 12:24:56 UTC 2021 - Fridrich Strba <fstrba@suse.com>
 
diff --git a/eclipse-jgit.spec b/eclipse-jgit.spec
index f712527..9e3d834 100644
--- a/eclipse-jgit.spec
+++ b/eclipse-jgit.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package eclipse-jgit
 #
-# Copyright (c) 2021 SUSE LLC
+# Copyright (c) 2022 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -59,6 +59,9 @@ BuildRequires:  slf4j
 BuildRequires:  tycho
 BuildRequires:  xml-commons-apis
 BuildRequires:  xmvn-subst
+BuildConflicts: java >= 12
+BuildConflicts: java-devel >= 12
+BuildConflicts: java-headless >= 12
 #!BuildIgnore:  eclipse-platform
 #!BuildIgnore:  tycho-bootstrap
 #!BuildRequires: eclipse-emf-core eclipse-ecf-core