Index: trunk/ppStack/src/ppStackReadout.c
===================================================================
--- trunk/ppStack/src/ppStackReadout.c	(revision 14855)
+++ trunk/ppStack/src/ppStackReadout.c	(revision 14857)
@@ -89,5 +89,5 @@
         // Generate convolved version of input
         pmReadout *convolved = pmReadoutAlloc(NULL); // Convolved version of input readout
-#ifdef NO_CONVOLUTION
+#ifndef NO_CONVOLUTION
         if (!ppStackMatch(convolved, ro, sources, config)) {
             psError(PS_ERR_UNKNOWN, false, "Unable to match image %d.", fileNum);