diff --git a/contrib/osmo-msc.spec.in b/contrib/osmo-msc.spec.in
index 1ebe9fa..da6c0ba 100644
--- a/contrib/osmo-msc.spec.in
+++ b/contrib/osmo-msc.spec.in
@@ -77,6 +77,7 @@
 %if %{with_iu}
   --enable-iu \
 %endif
+  --enable-smpp \
   --docdir=%{_docdir}/%{name} \
   --with-systemdsystemunitdir=%{_unitdir}