diff --git a/msgblock_test.go b/msgblock_test.go
index 780a657e..5196e17a 100644
--- a/msgblock_test.go
+++ b/msgblock_test.go
@@ -35,7 +35,7 @@ func TestBlock(t *testing.T) {
 
 	// Ensure max payload is expected value for latest protocol version.
 	// Num addresses (varInt) + max allowed addresses.
-	wantPayload := uint32(1024 * 1024)
+	wantPayload := uint32(1000000)
 	maxPayload := msg.MaxPayloadLength(pver)
 	if maxPayload != wantPayload {
 		t.Errorf("MaxPayloadLength: wrong max payload length for "+