diff --git a/plasma5-workspace.changes b/plasma5-workspace.changes
index 49f4754..e0d4205 100644
--- a/plasma5-workspace.changes
+++ b/plasma5-workspace.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu May 11 13:06:07 UTC 2023 - Fabian Vogt <fabian@ritter-vogt.de>
+
+- Require cpp explicitly, xrdb doesn't do it anymore
+
 -------------------------------------------------------------------
 Tue May  9 13:44:15 UTC 2023 - Fabian Vogt <fabian@ritter-vogt.de>
 
diff --git a/plasma5-workspace.spec b/plasma5-workspace.spec
index 7cfb5b7..d8a1a22 100644
--- a/plasma5-workspace.spec
+++ b/plasma5-workspace.spec
@@ -186,6 +186,8 @@ Requires:       kuserfeedback-imports
 Requires:       xembedsniproxy >= %{_plasma5_version}
 # startkde and startplasma call these
 Requires:       awk
+# krdb uses xrdb with cpp preprocessing
+Requires:       cpp
 Requires:       xrdb
 Requires:       xsetroot
 # Used by Source3: xprop-kde-full-session.desktop