diff --git a/src/net.h b/src/net.h
index 7d3047d80..8901146ca 100644
--- a/src/net.h
+++ b/src/net.h
@@ -63,7 +63,7 @@ static const unsigned int MAX_INV_SZ = 50000;
 /** The maximum number of new addresses to accumulate before announcing. */
 static const unsigned int MAX_ADDR_TO_SEND = 1000;
 /** Maximum length of incoming protocol messages (no message over 2 MiB is currently acceptable). */
-static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 2 * 1024 * 1024;
+static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 4 * 1024 * 1024;
 /** Maximum length of strSubVer in `version` message */
 static const unsigned int MAX_SUBVERSION_LENGTH = 256;
 /** -listen default */