@@ -55,19 +55,22 @@
  * @return A new, autoreleased OFMethodSignature
  * @throw OFInvalidFormatException The type encoding is invalid
  */
 + (instancetype)signatureWithObjCTypes: (const char *)types;
 
+- (instancetype)init OF_UNAVAILABLE;
+
 /**
  * @brief Initializes an already allocated OFMethodSignature with the specified
  *	  ObjC types.
  *
  * @param types The ObjC types of the method
  * @return An Initialized OFMethodSignature
  * @throw OFInvalidFormatException The type encoding is invalid
  */
-- (instancetype)initWithObjCTypes: (const char *)types;
+- (instancetype)initWithObjCTypes: (const char *)types
+    OF_DESIGNATED_INITIALIZER;
 
 /**
  * @brief Returns the ObjC type for the argument at the specified index.
  *
  * @param index The index of the argument for which to return the ObjC type