Index: trunk/ppImage/src/ppImageSetMaskBits.c
===================================================================
--- trunk/ppImage/src/ppImageSetMaskBits.c	(revision 42293)
+++ trunk/ppImage/src/ppImageSetMaskBits.c	(revision 42382)
@@ -79,4 +79,7 @@
     options->blankMask = pmConfigMaskGet("BLANK", config);
     psAssert (options->blankMask, "blank mask not set");
+    if (options->overscan) {
+	options->overscan->maskVal  = options->blankMask;
+    }
 
     // mask for saturated data  (default to RANGE if not defined)