@@ -30,10 +30,11 @@
 @class OFDNSResolverSettings;
 @class OFDate;
 @class OFDictionary OF_GENERIC(KeyType, ObjectType);
 @class OFMutableDictionary OF_GENERIC(KeyType, ObjectType);
 @class OFNumber;
+@class OFPair OF_GENERIC(FirstType, SecondType);
 @class OFTCPSocket;
 @class OFUDPSocket;
 
 /**
  * @enum OFDNSResolverErrorCode OFDNSResolver.h ObjFW/OFDNSResolver.h
@@ -132,10 +133,12 @@
 	char _buffer[OFDNSResolverBufferLength];
 	OFMutableDictionary OF_GENERIC(OFNumber *, OFDNSResolverContext *)
 	    *_queries;
 	OFMutableDictionary OF_GENERIC(OFTCPSocket *, OFDNSResolverContext *)
 	    *_TCPQueries;
+	OFMutableDictionary OF_GENERIC(OFDNSQuery *,
+	    OFPair OF_GENERIC(OFDate *, OFDNSResponse *) *) *_cache;
 }
 
 /**
  * @brief A dictionary of static hosts.
  *