Index: trunk/psastro/src/psastroAstromGuess.c
===================================================================
--- trunk/psastro/src/psastroAstromGuess.c	(revision 20805)
+++ trunk/psastro/src/psastroAstromGuess.c	(revision 21183)
@@ -267,5 +267,5 @@
     psVector *cornerDn = psVectorAllocEmpty (100, PS_TYPE_F32);
 
-    psVector *cornerMK = psVectorAllocEmpty (100, PS_TYPE_U8);
+    psVector *cornerMK = psVectorAllocEmpty (100, PS_TYPE_VECTOR_MASK);
 
     if (DEBUG) psastroDumpCorners ("corners.up.guess3.dat", "corners.dn.guess3.dat", fpa);