diff --git a/newdungeon.py b/newdungeon.py
index 87ac249..0575d2c 100755
--- a/newdungeon.py
+++ b/newdungeon.py
@@ -166,7 +166,7 @@ long conditions[] = {{
 {}
 }};
 
-vocabulary_t vocabulary[] {{
+const vocabulary_t vocabulary[] = {{
 {}
 }};