diff --git a/framework/DeclEntityDef.h b/framework/DeclEntityDef.h
index 2630f9a..dd82d0e 100644
--- a/framework/DeclEntityDef.h
+++ b/framework/DeclEntityDef.h
@@ -45,7 +45,7 @@ public:
 	virtual const char *	DefaultDefinition() const;
 	virtual bool			Parse( const char *text, const int textLength );
 	virtual void			FreeData( void );
-	virtual void			Print( void );
+	virtual void			Print( void ) const;
 };
 
 #endif /* !__DECLENTITYDEF_H__ */
diff --git a/renderer/Model.h b/renderer/Model.h
index 419a64e..da6aa27 100644
--- a/renderer/Model.h
+++ b/renderer/Model.h
@@ -208,7 +208,7 @@ public:
 	virtual void				LoadModel() = 0;
 
 	// internal use
-	virtual bool				IsLoaded() = 0;
+	virtual bool				IsLoaded() const = 0;
 	virtual void				SetLevelLoadReferenced( bool referenced ) = 0;
 	virtual bool				IsLevelLoadReferenced() = 0;