Index: trunk/psphot/src/psphotSourceSize.c
===================================================================
--- trunk/psphot/src/psphotSourceSize.c	(revision 20829)
+++ trunk/psphot/src/psphotSourceSize.c	(revision 20831)
@@ -218,7 +218,7 @@
     // now that we have masked pixels associated with CRs, we can grow the mask
     if (grow > 0) {
-        bool oldThreads = psImageConvolveThreads(true); // Old value of threading for psImageConvolveMask
+        bool oldThreads = psImageConvolveSetThreads(true); // Old value of threading for psImageConvolveMask
         psImage *newMask = psImageConvolveMask(NULL, readout->mask, crMask, crMask, -grow, grow, -grow, grow);
-        psImageConvolveThreads(oldThreads);
+        psImageConvolveSetThreads(oldThreads);
         if (!newMask) {
             psError(PS_ERR_UNKNOWN, false, "Unable to grow CR mask");