diff --git a/scala.spec b/scala.spec
index ca7ce7d..9168734 100644
--- a/scala.spec
+++ b/scala.spec
@@ -68,6 +68,9 @@ BuildRequires:  java-devel >= 1.7
 BuildRequires:  javapackages-local
 BuildRequires:  jline >= 2.10
 BuildRequires:  junit
+BuildConflicts: java >= 9
+BuildConflicts: java-devel >= 9
+BuildConflicts: java-headless >= 9
 Requires:       jansi
 Requires:       java-headless >= 1.7
 # Require full javapackages-tools since scripts use