@@ -14,10 +14,12 @@
  * file.
  */
 
 #import "OFException.h"
 
+OF_ASSUME_NONNULL_BEGIN
+
 @class OFStream;
 
 /*!
  * @class OFGetOptionFailedException \
  *	  OFGetOptionFailedException.h ObjFW/OFGetOptionFailedException.h
@@ -58,5 +60,7 @@
  * @return An initialized get option failed exception
  */
 - initWithStream: (OFStream*)stream
 	   errNo: (int)errNo;
 @end
+
+OF_ASSUME_NONNULL_END