diff --git a/slsDetectorServers/mythen3DetectorServer/mythen3.c b/slsDetectorServers/mythen3DetectorServer/mythen3.c
index f4dc01871..a03fd736d 100644
--- a/slsDetectorServers/mythen3DetectorServer/mythen3.c
+++ b/slsDetectorServers/mythen3DetectorServer/mythen3.c
@@ -304,7 +304,7 @@ patternParameters *setChannelRegisterChip(int ichip, char *mask,
                 chanReg |= (0x1 << (3 + icounter));
             }
         }
-
+        chanReg /= 2;
         // deserialize
         if (chanReg & CHAN_REG_BAD_CHANNEL_MSK) {
             LOG(logINFOBLUE,