diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 50a6e1ac8d9cb48419c1547f72226a46543234c9..389bc6fd19aed0d1f0506d88f26caacb42d8e908 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -47,7 +47,7 @@ struct scsi_host_sg_pool {
 	mempool_t	*pool;
 };
 
-#define SP(x) { x, "sgpool-" __stringify(x) }
+#define SP(x) { .size = x, "sgpool-" __stringify(x) }
 #if (SCSI_MAX_SG_SEGMENTS < 32)
 #error SCSI_MAX_SG_SEGMENTS is too small (must be 32 or greater)
 #endif