@@ -14,10 +14,12 @@
  * file.
  */
 
 #import "OFException.h"
 
+OF_ASSUME_NONNULL_BEGIN
+
 @class OFXMLElement;
 
 /*!
  * @class OFUnboundNamespaceException \
  *	  OFUnboundNamespaceException.h ObjFW/OFUnboundNamespaceException.h
@@ -62,5 +64,7 @@
  * @return An initialized unbound namespace exception
  */
 - initWithNamespace: (OFString*)namespace_
 	    element: (OFXMLElement*)element;
 @end
+
+OF_ASSUME_NONNULL_END