Index: src/OFPair.h
==================================================================
--- src/OFPair.h
+++ src/OFPair.h
@@ -62,15 +62,16 @@
  * @param firstObject The first object for the pair
  * @param secondObject The second object for the pair
  * @return An initialized OFPair
  */
 - (instancetype)initWithFirstObject: (nullable FirstType)firstObject
-		       secondObject: (nullable SecondType)secondObject;
+		       secondObject: (nullable SecondType)secondObject
+    OF_DESIGNATED_INITIALIZER;
 #if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
 # undef FirstType
 # undef SecondType
 #endif
 @end
 
 OF_ASSUME_NONNULL_END
 
 #import "OFMutablePair.h"

Index: src/OFTriple.h
==================================================================
--- src/OFTriple.h
+++ src/OFTriple.h
@@ -74,11 +74,12 @@
  * @param thirdObject The second object for the triple
  * @return An initialized OFTriple
  */
 - (instancetype)initWithFirstObject: (nullable FirstType)firstObject
 		       secondObject: (nullable SecondType)secondObject
-			thirdObject: (nullable ThirdType)thirdObject;
+			thirdObject: (nullable ThirdType)thirdObject
+    OF_DESIGNATED_INITIALIZER;
 #if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
 # undef FirstType
 # undef SecondType
 # undef ThirdType
 #endif