@@ -15,10 +15,12 @@
  */
 
 #import "OFObject.h"
 #import "OFString.h"
 #import "OFINICategory.h"
+
+OF_ASSUME_NONNULL_BEGIN
 
 @class OFMutableArray OF_GENERIC(ObjectType);
 
 /*!
  * @class OFINIFile OFINIFile.h ObjFW/OFINIFile.h
@@ -99,5 +101,7 @@
  * @param encoding The encoding to use
  */
 - (void)writeToFile: (OFString*)path
 	   encoding: (of_string_encoding_t)encoding;
 @end
+
+OF_ASSUME_NONNULL_END