Index: trunk/psModules/src/camera/pmFPAMaskWeight.c
===================================================================
--- trunk/psModules/src/camera/pmFPAMaskWeight.c	(revision 13591)
+++ trunk/psModules/src/camera/pmFPAMaskWeight.c	(revision 13863)
@@ -136,4 +136,7 @@
                 maskData[i][j] |= badMask;
             }
+            if (!isfinite(imageData[i][j])) {
+                maskData[i][j] |= badMask;
+            }
         }
     }