diff --git a/include/uapi/ub/urma/udma/udma_abi.h b/include/uapi/ub/urma/udma/udma_abi.h
index 5859f5254b5e4543cc34cbe5d313abb8a6bb7601..257962765d5aab447ac116b6ce4858d62f4a7194 100644
--- a/include/uapi/ub/urma/udma/udma_abi.h
+++ b/include/uapi/ub/urma/udma/udma_abi.h
@@ -6,9 +6,9 @@
 
 #include <linux/types.h>
 
-#define MAP_COMMAND_MASK 0xff
-#define MAP_INDEX_MASK 0xffffff
-#define MAP_INDEX_SHIFT 8
+#define MAP_COMMAND_MASK 0xf
+#define MAP_INDEX_MASK 0xfffffff
+#define MAP_INDEX_SHIFT 4
 
 #define UDMA_SEGMENT_ACCESS_GUARD (1UL << 5)
 
@@ -112,9 +112,9 @@ struct udma_create_jfr_resp {
 };
 
 enum db_mmap_type {
+	UDMA_MMAP_HUGEPAGE,
 	UDMA_MMAP_JFC_PAGE,
 	UDMA_MMAP_JETTY_DSQE,
-	UDMA_MMAP_HUGEPAGE,
 };
 
 enum {