diff --git a/core/hw/maple/maple_if.cpp b/core/hw/maple/maple_if.cpp
index e8d2c597d..978c4f4b3 100644
--- a/core/hw/maple/maple_if.cpp
+++ b/core/hw/maple/maple_if.cpp
@@ -166,7 +166,7 @@ void maple_DoDma()
 			if (MapleDevices[bus][5] && MapleDevices[bus][port])
 			{
 				u32 outlen = MapleDevices[bus][port]->RawDma(&p_data[0], inlen + 4, &p_out[0]);
-				xfer_count =+ outlen;
+				xfer_count += outlen;
 			}
 			else
 			{