diff --git a/ceph.spec.in b/ceph.spec.in
index 5207a1f3018..caccc45880b 100644
--- a/ceph.spec.in
+++ b/ceph.spec.in
@@ -1384,6 +1384,9 @@ cmake .. \
 %endif
 %if 0%{with system_utf8proc}
     -DWITH_SYSTEM_UTF8PROC:BOOL=ON \
+%endif
+%if 0%{with seastar}
+    -DWITH_SEASTAR:BOOL=ON \
 %endif
     -DWITH_GRAFANA:BOOL=ON