diff --git a/gaboshlib/g_num_valid_number.sh b/gaboshlib/g_num_valid_number.sh
index 2b76ecc..d8f6d83 100644
--- a/gaboshlib/g_num_valid_number.sh
+++ b/gaboshlib/g_num_valid_number.sh
@@ -1,10 +1,10 @@
 function g_num_valid_number {
-  local f_num
-  for f_num in $@
+  local f_arg=( "0" "$@" )
+  for (( i=0; i<=$#; i++ ))
   do
-    if ! [[ ${f_num} =~ ^(-)?(\.)?[0-9]+(\.[0-9]+)?$ ]]
+    if ! [[ ${f_arg[$i]} =~ ^(-)?(\.)?[0-9]+(\.)?([0-9]+)?$ ]]
     then
-      echo "\"${f_num}\": Not a valid number" 1>&2
+      echo "\"${f_arg[$i]}\": Not a valid number" 1>&2
       g_traceback
       return 1
     fi