diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java b/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java
index 53261205d..099e56182 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java
@@ -84,6 +84,15 @@ public class KeySpecParser {
             }
             mIconId = getIconId(moreKeySpec);
         }
+
+        @Override
+        public String toString() {
+            final String label = (mIconId == KeyboardIconsSet.ICON_UNDEFINED ? mLabel
+                    : PREFIX_ICON + KeyboardIconsSet.getIconName(mIconId));
+            final String output = (mCode == Keyboard.CODE_OUTPUT_TEXT ? mOutputText
+                    : String.format("0x%04x", mCode));
+            return label + "/" + output;
+        }
     }
 
     private KeySpecParser() {