Index: src/OFDatagramSocket.h
==================================================================
--- src/OFDatagramSocket.h
+++ src/OFDatagramSocket.h
@@ -39,18 +39,15 @@
     const OFSocketAddress *_Nonnull sender, id _Nullable exception);
 
 /**
  * @brief A block which is called when a packet has been sent.
  *
- * @param data The data which was sent
- * @param receiver The receiver for the packet
  * @param exception An exception which occurred while reading or `nil` on
  *		    success
  * @return The data to repeat the send with or nil if it should not repeat
  */
 typedef OFData *_Nullable (^OFDatagramSocketAsyncSendDataBlock)(
-    OFData *_Nonnull data, const OFSocketAddress *_Nonnull receiver,
     id _Nullable exception);
 #endif
 
 /**
  * @protocol OFDatagramSocketDelegate OFDatagramSocket.h \

Index: src/OFRunLoop.m
==================================================================
--- src/OFRunLoop.m
+++ src/OFRunLoop.m
@@ -588,11 +588,11 @@
 	if (_writtenLength != dataLength && exception == nil)
 		return true;
 
 # ifdef OF_HAVE_BLOCKS
 	if (_block != NULL) {
-		newData = _block(_data, _writtenLength, exception);
+		newData = _block(_writtenLength, exception);
 
 		if (newData == nil)
 			return false;
 
 		oldData = _data;
@@ -665,11 +665,11 @@
 	if (_writtenLength != cStringLength && exception == nil)
 		return true;
 
 # ifdef OF_HAVE_BLOCKS
 	if (_block != NULL) {
-		newString = _block(_string, _writtenLength, exception);
+		newString = _block(_writtenLength, exception);
 
 		if (newString == nil)
 			return false;
 
 		oldString = _string;
@@ -859,11 +859,11 @@
 		exception = e;
 	}
 
 # ifdef OF_HAVE_BLOCKS
 	if (_block != NULL) {
-		newData = _block(_data, &_receiver, exception);
+		newData = _block(exception);
 
 		if (newData == nil)
 			return false;
 
 		oldData = _data;
@@ -960,11 +960,11 @@
 		exception = e;
 	}
 
 # ifdef OF_HAVE_BLOCKS
 	if (_block != NULL) {
-		newData = _block(_data, exception);
+		newData = _block(exception);
 
 		if (newData == nil)
 			return false;
 
 		oldData = _data;

Index: src/OFSequencedPacketSocket.h
==================================================================
--- src/OFSequencedPacketSocket.h
+++ src/OFSequencedPacketSocket.h
@@ -38,17 +38,16 @@
     id _Nullable exception);
 
 /**
  * @brief A block which is called when a packet has been sent.
  *
- * @param data The data which was sent
  * @param exception An exception which occurred while reading or `nil` on
  *		    success
  * @return The data to repeat the send with or nil if it should not repeat
  */
 typedef OFData *_Nullable (^OFSequencedPacketSocketAsyncSendDataBlock)(
-    OFData *_Nonnull data, id _Nullable exception);
+    id _Nullable exception);
 
 /**
  * @brief A block which is called when the socket accepted a connection.
  *
  * @param acceptedSocket The socket which has been accepted

Index: src/OFStream.h
==================================================================
--- src/OFStream.h
+++ src/OFStream.h
@@ -63,35 +63,33 @@
 
 /**
  * @brief A block which is called when data was written asynchronously to a
  *	  stream.
  *
- * @param data The data which was written to the stream
  * @param bytesWritten The number of bytes which have been written. This
  *		       matches the length of the specified data on the
  *		       asynchronous write if no exception was encountered.
  * @param exception An exception which occurred while writing or `nil` on
  *		    success
  * @return The data to repeat the write with or nil if it should not repeat
  */
-typedef OFData *_Nullable (^OFStreamAsyncWriteDataBlock)(OFData *_Nonnull data,
-    size_t bytesWritten, id _Nullable exception);
+typedef OFData *_Nullable (^OFStreamAsyncWriteDataBlock)(size_t bytesWritten,
+    id _Nullable exception);
 
 /**
  * @brief A block which is called when a string was written asynchronously to a
  *	  stream.
  *
- * @param string The string which was written to the stream
  * @param bytesWritten The number of bytes which have been written. This
  *		       matches the length of the specified data on the
  *		       asynchronous write if no exception was encountered.
  * @param exception An exception which occurred while writing or `nil` on
  *		    success
  * @return The string to repeat the write with or nil if it should not repeat
  */
 typedef OFString *_Nullable (^OFStreamAsyncWriteStringBlock)(
-    OFString *_Nonnull string, size_t bytesWritten, id _Nullable exception);
+    size_t bytesWritten, id _Nullable exception);
 #endif
 
 /**
  * @protocol OFStreamDelegate OFStream.h ObjFW/OFStream.h
  *