diff --git a/src/java/com/threerings/io/FieldMarshaller.java b/src/java/com/threerings/io/FieldMarshaller.java
index 1c0102e44..bc0362d6a 100644
--- a/src/java/com/threerings/io/FieldMarshaller.java
+++ b/src/java/com/threerings/io/FieldMarshaller.java
@@ -77,7 +77,7 @@ public abstract class FieldMarshaller
                 return new MethodFieldMarshaller(reader, writer);
             } else if (reader == null || writer == null) {
                 log.warning("Class contains one but not both custom field reader and writer" +
-                            "class", field.getDeclaringClass().getName(), "field=", field.getName(),
+                            "class", field.getDeclaringClass().getName(), "field", field.getName(),
                             "reader", reader, "writer", writer);
                 // fall through to using reflection on the fields...
             }