diff --git a/plugins/include/engine.inc b/plugins/include/engine.inc
index 1afc79ef..37820ef6 100755
--- a/plugins/include/engine.inc
+++ b/plugins/include/engine.inc
@@ -131,7 +131,7 @@ native is_valid_ent(iIndex);
 native entity_set_origin(iIndex, Float:fNewOrigin[3]);
 
 /* Sets the model of an Entity. */
-native entity_set_model(iIndex, szModel[]);
+native entity_set_model(iIndex, const szModel[]);
 
 /* Remove an entity from the world. */
 native remove_entity(iIndex);