diff --git a/src/net/common/receivebuffer.cpp b/src/net/common/receivebuffer.cpp
index 3673f1f3..e9ef0ac9 100644
--- a/src/net/common/receivebuffer.cpp
+++ b/src/net/common/receivebuffer.cpp
@@ -82,7 +82,8 @@ ReceiveBuffer::ScanPackets()
 		// several packets may be received at once.
 		if (recvBufUsed >= NET_HEADER_SIZE) {
 			// Read the size of the packet (first 4 bytes in network byte order).
-			size_t packetSize = ntohl(*((uint32_t *)&recvBuf[0]));
+			const char *recvBufStart = &recvBuf[0];
+			size_t packetSize = ntohl(*((const uint32_t *)&recvBufStart));
 			if (recvBufUsed >= packetSize + NET_HEADER_SIZE)
 			{
 				try {