Index: Doxyfile
==================================================================
--- Doxyfile
+++ Doxyfile
@@ -11,10 +11,11 @@
 	     OF_HAVE_FILES		\
 	     OF_HAVE_SOCKETS		\
 	     OF_HAVE_THREADS		\
 	     OF_NO_RETURN		\
 	     OF_NO_RETURN_FUNC		\
+	     OF_NULLABLE_PROPERTY	\
 	     OF_SENTINEL		\
 	     OF_REQUIRES_SUPER		\
 	     OF_RETURNS_RETAINED	\
 	     OF_RETURNS_NOT_RETAINED	\
 	     OF_RETURNS_INNER_POINTER	\

Index: src/OFIntrospection.h
==================================================================
--- src/OFIntrospection.h
+++ src/OFIntrospection.h
@@ -17,12 +17,12 @@
 #import "OFObject.h"
 
 OF_ASSUME_NONNULL_BEGIN
 
 @class OFString;
-#ifndef DOXYGEN
 @class OFArray OF_GENERIC(ObjectType);
+#ifndef DOXYGEN
 @class OFMutableArray OF_GENERIC(ObjectType);
 #endif
 
 enum {
 	OF_PROPERTY_READONLY	=   0x01,

Index: src/OFOptionsParser.h
==================================================================
--- src/OFOptionsParser.h
+++ src/OFOptionsParser.h
@@ -80,11 +80,11 @@
  * The last parsed option.
  *
  * If @ref nextOption returned `?` or `:`, this returns the option which was
  * unknown or for which the argument was missing.@n
  * If this returns `-`, the last option is only available as a long option (see
- * @ref lastLongOption).
+ * lastLongOption).
  */
 @property (readonly) of_unichar_t lastOption;
 
 /*!
  * The long option for the last parsed option, or `nil` if the last parsed