@@ -25,10 +25,18 @@
 #endif
 
 #import "OFBridging.h"
 
 OF_ASSUME_NONNULL_BEGIN
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern int _OFString_NSObject_reference;
+#ifdef __cplusplus
+}
+#endif
 
 /*!
  * @category OFString (NSObject) \
  *	     OFString+NSObject.h ObjFW-Bridge/OFString+NSObject.h
  *