diff --git a/fmap.py b/fmap.py
index 830a64e..982d1a5 100644
--- a/fmap.py
+++ b/fmap.py
@@ -68,6 +68,8 @@
 FMAP_FLAGS = {
     'FMAP_AREA_STATIC': 1 << 0,
     'FMAP_AREA_COMPRESSED': 1 << 1,
+    'FMAP_AREA_RO': 1 << 2,
+    'FMAP_AREA_PRESERVE': 1 << 3,
 }
 
 FMAP_HEADER_NAMES = (
diff --git a/lib/fmap.c b/lib/fmap.c
index 8984697..c62735d 100644
--- a/lib/fmap.c
+++ b/lib/fmap.c
@@ -57,6 +57,7 @@
 	{ FMAP_AREA_STATIC, "static" },
 	{ FMAP_AREA_COMPRESSED, "compressed" },
 	{ FMAP_AREA_RO, "ro" },
+	{ FMAP_AREA_PRESERVE, "preserve" },
 };
 
 /* returns size of fmap data structure if successful, <0 to indicate error */
diff --git a/lib/fmap.h b/lib/fmap.h
index 51bd768..05993fd 100644
--- a/lib/fmap.h
+++ b/lib/fmap.h
@@ -54,6 +54,7 @@
 	FMAP_AREA_STATIC	= 1 << 0,
 	FMAP_AREA_COMPRESSED	= 1 << 1,
 	FMAP_AREA_RO		= 1 << 2,
+	FMAP_AREA_PRESERVE	= 1 << 3,  /* Should be preserved on update. */
 };
 
 /* Mapping of volatile and static regions in firmware binary */