diff --git a/include/uapi/linux/rds.h b/include/uapi/linux/rds.h
index 47c03ca..198892b 100644
--- a/include/uapi/linux/rds.h
+++ b/include/uapi/linux/rds.h
@@ -195,14 +195,14 @@
 };
 
 struct rds_rx_trace_so {
-	u8 rx_traces;
-	u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX];
+	__u8 rx_traces;
+	__u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX];
 };
 
 struct rds_cmsg_rx_trace {
-	u8 rx_traces;
-	u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX];
-	u64 rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX];
+	__u8 rx_traces;
+	__u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX];
+	__u64 rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX];
 };
 
 /*