@@ -14,10 +14,12 @@
  * file.
  */
 
 #import "OFObject.h"
 
+OF_ASSUME_NONNULL_BEGIN
+
 @class OFString;
 
 /*!
  * @class OFAllocFailedException \
  *	  OFAllocFailedException.h ObjFW/OFAllocFailedException.h
@@ -39,5 +41,7 @@
  *
  * @return A description of the exception
  */
 - (OFString*)description;
 @end
+
+OF_ASSUME_NONNULL_END