diff --git a/fax.sh b/fax.sh
index 4c92a3e..5bca8e7 100755
--- a/fax.sh
+++ b/fax.sh
@@ -65,7 +65,8 @@ then
 fi
 if hash gs 2>/dev/null
 then
-	if [ $(gs -q -dNODISPLAY -c "(fax.pdf) (r) file runpdfbegin pdfpagecount = quit" 2>&1) -gt 30 ]
+	PAGES=$(gs -q -dNODISPLAY -c "($FILE) (r) file runpdfbegin pdfpagecount = quit" 2>&1)
+	if [ $PAGES -gt 30 ]
 	then
 		echo "Sipgate won't send your file, because it has more than 30 pages"
 		exit 2