Index: trunk/ppImage/src/ppImageDetrendFringe.c
===================================================================
--- trunk/ppImage/src/ppImageDetrendFringe.c	(revision 24910)
+++ trunk/ppImage/src/ppImageDetrendFringe.c	(revision 24911)
@@ -262,5 +262,5 @@
 	for (int iy = 0; iy < readout->image->numRows; iy++) {
 	    for (int ix = 0; ix < readout->image->numCols; ix++) {
-		readout->mask->data.F32[iy][ix] -= sumFringe->data.F32[iy][ix];
+  	        readout->image->data.F32[iy][ix] -= sumFringe->data.F32[iy][ix];
 		if (!isfinite(sumFringe->data.F32[iy][ix]) && readout->mask) {
 		    readout->mask->data.PS_TYPE_IMAGE_MASK_DATA[iy][ix] |= maskVal;