diff --git a/gaboshlib/g_num_valid_number.sh b/gaboshlib/g_num_valid_number.sh
index 261da04..e131520 100644
--- a/gaboshlib/g_num_valid_number.sh
+++ b/gaboshlib/g_num_valid_number.sh
@@ -1,6 +1,7 @@
 function g_num_valid_number {
   [ -z "$1" ] && return 1
   local f_arg=( "0" "$@" )
+  local i
   for (( i=0; i<=$#; i++ ))
   do
     if ! [[ ${f_arg[$i]} =~ ^(-)?(\.)?[0-9]+(\.)?([0-9]+)?$ ]]