diff --git a/WHATS_NEW b/WHATS_NEW
index 1ab991b16..cbebc88f1 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.83 - 
 ===================================
+  Avoid rebuilding of uuid validation table.
   Always use O_DIRECT when opening block devices to check for partitioning.
   Improve lvcreate "insufficient extents" errors to "insufficient free space".
 
diff --git a/lib/uuid/uuid.c b/lib/uuid/uuid.c
index e85e852c4..edcb1ba30 100644
--- a/lib/uuid/uuid.c
+++ b/lib/uuid/uuid.c
@@ -125,6 +125,7 @@ static void _build_inverse(void)
 	if (_built_inverse)
 		return;
 
+	_built_inverse = 1;
 	memset(_inverse_c, 0, sizeof(_inverse_c));
 
 	for (ptr = _c; *ptr; ptr++)