diff --git a/site_ansto/motor_dmc2280.c b/site_ansto/motor_dmc2280.c
index deb94c20..6a6e9c4d 100644
--- a/site_ansto/motor_dmc2280.c
+++ b/site_ansto/motor_dmc2280.c
@@ -886,7 +886,7 @@ static int readAbsEnc(pDMC2280Driv self, long *pos) {
     return FAILURE;
 
   long iCounts = atol(reply);
-  if (self->bias_bits > 0 && self->bias_bias != 0)
+  if (self->bias_bits > 0)
     iCounts = (iCounts + self->bias_bias) & ((1 << self->bias_bits) - 1);
   *pos = iCounts;
   return SUCCESS;
@@ -1317,7 +1317,7 @@ static int rspStatus(pDMC2280Driv self, const char* text) {
   }
   self->currFlags = iFlags;
   self->currSteps = iSteps;
-  if (self->bias_bits > 0 && self->bias_bias != 0)
+  if (self->bias_bits > 0)
     iCounts = (iCounts + self->bias_bias) & ((1 << self->bias_bits) - 1);
   self->currCounts = iCounts;
   self->currPosition = motPosit(self);
@@ -3835,7 +3835,7 @@ MotorDriver *CreateDMC2280(SConnection *pCon, char *motor, char *params) {
 
     /* BIAS for encoder - mask this many bits */
     if ((pPtr=getParam(pCon, interp, params,"bias_bits",_OPTIONAL)) == NULL)
-      pNew->bias_bits = 0.0;
+      pNew->bias_bits = 0;
     else {
       sscanf(pPtr, "%d", &(pNew->bias_bits));
       if (pNew->bias_bits < 0)