@@ -14,10 +14,12 @@
  * file.
  */
 
 #import "OFXMLNode.h"
 
+OF_ASSUME_NONNULL_BEGIN
+
 /*!
  * @class OFXMLProcessingInstructions \
  *	  OFXMLProcessingInstructions.h ObjFW/OFXMLProcessingInstructions.h
  *
  * @brief A class for representing XML processing instructions.
@@ -42,5 +44,7 @@
  * @param string The string for the processing instructions
  * @return An initialized OFXMLProcessingInstructions
  */
 - initWithString: (OFString*)string;
 @end
+
+OF_ASSUME_NONNULL_END