@@ -14,10 +14,12 @@
  * file.
  */
 
 #import "OFString.h"
 
+OF_ASSUME_NONNULL_BEGIN
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 extern int _OFString_URLEncoding_reference;
 #ifdef __cplusplus
@@ -37,5 +39,7 @@
  *
  * @return A new autoreleased string
  */
 - (OFString*)stringByURLDecoding;
 @end
+
+OF_ASSUME_NONNULL_END