diff --git a/src/main/java/com/samskivert/util/MissingPropertyException.java b/src/main/java/com/samskivert/util/MissingPropertyException.java
index ef2006e8..440f5587 100644
--- a/src/main/java/com/samskivert/util/MissingPropertyException.java
+++ b/src/main/java/com/samskivert/util/MissingPropertyException.java
@@ -27,8 +27,16 @@ package com.samskivert.util;
  */
 public class MissingPropertyException extends RuntimeException
 {
-    public MissingPropertyException (String message)
+    public MissingPropertyException (String key, String message)
     {
         super(message);
+        _key = key;
     }
+
+    public String getKey ()
+    {
+        return _key;
+    }
+
+    protected String _key;
 }
diff --git a/src/main/java/com/samskivert/util/PropertiesUtil.java b/src/main/java/com/samskivert/util/PropertiesUtil.java
index 585e0d03..900915af 100644
--- a/src/main/java/com/samskivert/util/PropertiesUtil.java
+++ b/src/main/java/com/samskivert/util/PropertiesUtil.java
@@ -238,7 +238,7 @@ public class PropertiesUtil
     {
         String value = props.getProperty(key);
         if (StringUtil.isBlank(value)) {
-            throw new MissingPropertyException(missingMessage);
+            throw new MissingPropertyException(key, missingMessage);
         }
         return value;
     }