diff --git a/core/src/main/java/com/threerings/io/FramedInputStream.java b/core/src/main/java/com/threerings/io/FramedInputStream.java
index b986f424c..2bc391791 100644
--- a/core/src/main/java/com/threerings/io/FramedInputStream.java
+++ b/core/src/main/java/com/threerings/io/FramedInputStream.java
@@ -103,6 +103,7 @@ public class FramedInputStream extends InputStream
                 log.warning("Problem reading frame",
                         "_have", _have,
                         "_length (and old limit)", _length,
+                        "capacity", _buffer.capacity(),
                         iae);
                 throw iae;
             }