diff --git a/images/inventory.proto b/images/inventory.proto
index feed5b850..fc1fd081f 100644
--- a/images/inventory.proto
+++ b/images/inventory.proto
@@ -34,4 +34,14 @@ message inventory_entry {
 	// network locking rule.
 	optional string                 dump_criu_run_id        = 13;
 	optional bool			allow_uprobes	= 14;
+	/*
+	 * Memory page compression mode. Encodes enum compress_mode:
+	 *   0 = COMPRESS_OFF
+	 *   1 = COMPRESS_PER_PAGE
+	 *   2 = COMPRESS_REGION
+	 * Absent or 0 means no compression was applied to the dump.
+	 */
+	optional uint32			compress = 15;
+	/* Region size in bytes when compress = 2. Informational. */
+	optional uint32			compress_region_size = 16;
 }
diff --git a/images/pagemap.proto b/images/pagemap.proto
index f2436a51a..08148c9bb 100644
--- a/images/pagemap.proto
+++ b/images/pagemap.proto
@@ -12,6 +12,41 @@ message pagemap_entry {
 	required uint64 vaddr		= 1 [(criu).hex = true];
 	required uint32 compat_nr_pages	= 2;
 	optional bool	in_parent	= 3;
+	/*
+	 * PE_PAYLOAD_ALIGNED means that payload bytes for this present entry
+	 * begin at the next host-page boundary in pages-*.img. Readers must skip
+	 * the padding before applying compressed_size[] or the ordinary raw size.
+	 */
 	optional uint32	flags		= 4 [(criu).flags = "pmap.flags" ];
 	optional uint64 nr_pages = 5;
+	/*
+	 * Size in bytes of each compressed block stored in the pages image.
+	 * One element per block: per page in per-page mode, per region in
+	 * region mode (see region_pages). Two values are special:
+	 *   0 = all-zero block, no payload is stored in the image.
+	 *   N = stored raw (incompressible), where N is the block's
+	 *       uncompressed byte size: PAGE_SIZE in per-page mode, or
+	 *       block_pages * PAGE_SIZE in region mode (the last region
+	 *       of an entry may hold fewer than region_pages pages).
+	 * Any other value is the length of the LZ4-compressed payload.
+	 *
+	 * Packed encoding avoids one protobuf tag per memory page.
+	 */
+	repeated uint32 compressed_size		= 6 [packed = true];
+	/*
+	 * Sum of all compressed_size[] entries: the total number of payload
+	 * bytes this entry occupies in the pages image. On restore it is an
+	 * O(1) shortcut to advance the read offset past a whole entry (see
+	 * skip_pagemap_pages()) instead of summing compressed_size[] block by
+	 * block. Offsets into the interior of an entry are still derived by
+	 * walking compressed_size[], since a single total cannot locate an
+	 * individual page.
+	 */
+	optional uint64	total_compressed_size	= 7;
+	/*
+	 * If set and > 0, compressed_size[] holds one element per region of
+	 * region_pages pages (the last region may be shorter than nr_pages %
+	 * region_pages). If unset or 0, compressed_size[] is per-page.
+	 */
+	optional uint32 region_pages		= 8;
 }
diff --git a/lib/pycriu/images/pb2dict.py b/lib/pycriu/images/pb2dict.py
index 6c687aace..9d6b748ff 100644
--- a/lib/pycriu/images/pb2dict.py
+++ b/lib/pycriu/images/pb2dict.py
@@ -148,6 +148,7 @@ pmap_flags_map = [
     ('PE_PARENT', 1 << 0),
     ('PE_LAZY', 1 << 1),
     ('PE_PRESENT', 1 << 2),
+    ('PE_PAYLOAD_ALIGNED', 1 << 3),
 ]
 
 flags_maps = {