diff --git a/qwt6.changes b/qwt6.changes
index 9c71d54..5f33b71 100644
--- a/qwt6.changes
+++ b/qwt6.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Jun  5 15:46:53 UTC 2019 - Luigi Baldoni <aloisio@gmx.com>
+
+- Fixed conflict with Qwt 5.
+
 -------------------------------------------------------------------
 Fri May 24 09:22:23 UTC 2019 - Luigi Baldoni <aloisio@gmx.com>
 
diff --git a/qwt6.spec b/qwt6.spec
index 8ea1da1..b2c37b9 100644
--- a/qwt6.spec
+++ b/qwt6.spec
@@ -76,6 +76,7 @@ Recommends:     %{name}-designer
 Recommends:     %{name}-devel-doc
 Recommends:     %{name}-examples
 Conflicts:      otherproviders(qwt-qt5-devel)
+Conflicts:      qwt-devel
 Provides:       qwt-qt5-devel = %{version}
 Obsoletes:      qwt6-qt5-devel < %{version}
 Provides:       qwt6-qt5-devel = %{version}