@@ -14,10 +14,12 @@
  * file.
  */
 
 #import "OFException.h"
 
+OF_ASSUME_NONNULL_BEGIN
+
 /*!
  * @class OFReadOrWriteFailedException \
  *	  OFReadOrWriteFailedException.h ObjFW/OFReadOrWriteFailedException.h
  *
  * @brief An exception indicating that reading from or writing to an object
@@ -91,5 +93,7 @@
  */
 -  initWithObject: (id)object
   requestedLength: (size_t)requestedLength
 	    errNo: (int)errNo;
 @end
+
+OF_ASSUME_NONNULL_END