diff --git a/configure/RELEASE b/configure/RELEASE
index 1290b50..ffb3789 100644
--- a/configure/RELEASE
+++ b/configure/RELEASE
@@ -20,6 +20,9 @@ CALC=/corvette/home/epics/devel/calc/2-6-5beta
 # SSCAN is needed for busy record and for scanning threshold on Pilatus
 SSCAN=/corvette/home/epics/devel/sscan/2-5-7beta
 
+# MCA is needed for fast accumulation of ROI counts
+MCA=/corvette/home/epics/devel/mca/6-10
+
 #AUTOSAVE is needed for save_restore
 AUTOSAVE=/corvette/home/epics/devel/autosave/4-4beta