diff --git a/src/network.zig b/src/network.zig
index 3aff027e..d3394ff9 100644
--- a/src/network.zig
+++ b/src/network.zig
@@ -1199,7 +1199,7 @@ pub const Protocols = struct {
 pub const Connection = struct { // MARK: Connection
 	const maxPacketSize: u32 = 65507; // max udp packet size
 	const importantHeaderSize: u32 = 5;
-	const maxImportantPacketSize: u32 = 1500 - 14 - 20 - 8; // Ethernet MTU minus Ethernet header minus IP header minus udp header
+	const maxImportantPacketSize: u32 = 576 - 20 - 8; // IPv4 MTU minus IP header minus udp header
 	const headerOverhead = 20 + 8 + 42; // IP Header + UDP Header + Ethernet header/footer
 	const congestionControl_historySize = 16;
 	const congestionControl_historyMask = congestionControl_historySize - 1;