diff --git a/pisi-spec.rng b/pisi-spec.rng
index 7e6acd70..a4a6d010 100644
--- a/pisi-spec.rng
+++ b/pisi-spec.rng
@@ -80,6 +80,9 @@
             <optional>
                 <ref name="Conflicts"/>
             </optional>
+            <optional>
+                <ref name="Replaces"/>
+            </optional>
             <ref name="Files"/>
             <optional>
                 <ref name="AdditionalFiles"/>