diff --git a/kf5-kservice.spec b/kf5-kservice.spec
index 6937d5d..18e4461 100644
--- a/kf5-kservice.spec
+++ b/kf5-kservice.spec
@@ -41,6 +41,9 @@ BuildRequires:  kf5-ki18n-devel >= %{version}
 BuildRequires:  kf5-rpm-macros >= %{version}
 BuildRequires:  qt5-qtbase-devel
 
+BuildRequires:  flex
+BuildRequires:  bison
+
 Requires:       kf5-filesystem >= %{version}
 # for the Administration category
 Requires:       redhat-menus