diff --git a/scripts/create_request.sh b/scripts/create_request.sh
index 8b12ca8..3e1a71c 100755
--- a/scripts/create_request.sh
+++ b/scripts/create_request.sh
@@ -149,9 +149,9 @@ fi
 
 currentblockheight=`ocl getblockcount` # may have updated by now
 # Request start height = confirmation time bufffer + current height + auction duration
-let start=$(( 1+$currentblockheight+$4 ))
+start=$(( 1+$currentblockheight+$4 ))
 # Request end height = request start height + request duration
-let end=start+$5
+end=$(( start+$5 ))
 
 # Address permission tokens will be locked in
 pub=`ocl validateaddress $(ocl getnewaddress | jq -r '.') | jq -r ".pubkey"`