diff --git a/el737hpdriv.c b/el737hpdriv.c
index 1f83030..0532ef5 100644
--- a/el737hpdriv.c
+++ b/el737hpdriv.c
@@ -354,6 +354,10 @@ static int EL737Start(struct __COUNTER *self)
   fixMode(pPriv);
   pPriv->readErrorCount = 0;
   if (self->eMode == ePreset) {
+    if (self->fPreset < 1. || self->fPreset >= 2147483647.) {
+      self->iErrorCode = BADTRANGE;
+      return HWFault;
+    } 
     snprintf(pCommand, 49, "MP %d\r", (int) self->fPreset);
   } else {
     if (self->fPreset < .1 || self->fPreset > 200000) {