diff --git a/src/factor/mod.rs b/src/factor/mod.rs
index 4d6788d..85e9060 100644
--- a/src/factor/mod.rs
+++ b/src/factor/mod.rs
@@ -95,7 +95,7 @@ impl Factor for BuiltinFactor {
         match self {
             Self::Trunc(f) => f.log_evidence(vars),
             Self::Margin(f) => f.log_evidence(vars),
-            _ => 0.0,
+            Self::TeamSum(_) | Self::RankDiff(_) => 0.0,
         }
     }
 }