diff --git a/src/com/annimon/everlastingsummer/Lexer.java b/src/com/annimon/everlastingsummer/Lexer.java
index b2ee6d7..8d07e35 100644
--- a/src/com/annimon/everlastingsummer/Lexer.java
+++ b/src/com/annimon/everlastingsummer/Lexer.java
@@ -43,6 +43,7 @@ public final class Lexer {
         KEYWORDS.put("cg", TokenType.CG);
         KEYWORDS.put("at", TokenType.AT);
         KEYWORDS.put("as", TokenType.AS);
+        KEYWORDS.put("define", TokenType.DEFINE);
         KEYWORDS.put("window", TokenType.WINDOW);
         KEYWORDS.put("hide", TokenType.HIDE);
         KEYWORDS.put("show", TokenType.SHOW);
diff --git a/src/com/annimon/everlastingsummer/TokenType.java b/src/com/annimon/everlastingsummer/TokenType.java
index 72ddcc3..0c4eb58 100644
--- a/src/com/annimon/everlastingsummer/TokenType.java
+++ b/src/com/annimon/everlastingsummer/TokenType.java
@@ -46,6 +46,7 @@ public enum TokenType {
     AT,
     AS,
     WITH,
+    DEFINE,
     
     MENU,
     ENDMENU,