diff --git a/dabo/functions/g_num_valid_number.sh b/dabo/functions/g_num_valid_number.sh
index c00c23d..ad1b5b0 100644
--- a/dabo/functions/g_num_valid_number.sh
+++ b/dabo/functions/g_num_valid_number.sh
@@ -2,7 +2,7 @@ function g_num_valid_number {
   local f_num
   for f_num in $@
   do
-    if ! [[ ${f_num} =~ ^(-\.)?[0-9]+(\.[0-9]+)?$ ]]
+    if ! [[ ${f_num} =~ ^(-)?(\.)?[0-9]+(\.[0-9]+)?$ ]]
     then
       g_echo "\"${f_num}\": Not a valid number"
       return 1