diff --git a/src/sample.c b/src/sample.c
index 794acb4..a246389 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -3424,7 +3424,7 @@
 	while (grpc_left > GRPC_MSG_HEADER_SZ) {
 		size_t grpc_msg_len, left;
 
-		grpc_msg_len = left = ntohl(*(uint32_t *)(pos + GRPC_MSG_COMPRESS_FLAG_SZ));
+		grpc_msg_len = left = ntohl(read_u32(pos + GRPC_MSG_COMPRESS_FLAG_SZ));
 
 		pos += GRPC_MSG_HEADER_SZ;
 		grpc_left -= GRPC_MSG_HEADER_SZ;