diff --git a/gaboshlib/g_num_exponential2normal.sh b/gaboshlib/g_num_exponential2normal.sh
index 5092a3a..36e6fc8 100644
--- a/gaboshlib/g_num_exponential2normal.sh
+++ b/gaboshlib/g_num_exponential2normal.sh
@@ -2,7 +2,7 @@
 function g_num_exponential2normal {
   [ -z "$1" ] && return 1
   # if there is a exponential number (for example 9.881e-05) convert it to "normal" notation
-  if [[ "$1" =~ ^(-)?(\.)?[0-9]+(\.)?([0-9]+)?(e-[0-9]+)?$ ]]
+  if [[ "$1" =~ e-[0-9] ]]
   then
     # convert
     printf -v f_g_num_exponential2normal_result -- "%.12f" "$1"