diff --git a/hudson-scripts/init/_0_log.sh b/hudson-scripts/init/_0_log.sh
index 0563c67..2fa9711 100644
--- a/hudson-scripts/init/_0_log.sh
+++ b/hudson-scripts/init/_0_log.sh
@@ -86,7 +86,7 @@
   for ((i=$start; i<FRAMES-1; i++)); do
     echo '  File' \"${BASH_SOURCE[i+1]}\", line ${BASH_LINENO[i]}, in ${FUNCNAME[i+1]} >> "${LS_OUTPUT}"
     # Grab the source code of the line
-    sed -E -n ${BASH_LINENO[i]}'s/^[:space:]*/    /p' "${BASH_SOURCE[i+1]}" >> "${LS_OUTPUT}"
+    sed -n -r ${BASH_LINENO[i]}'s/^[:space:]*/    /p' "${BASH_SOURCE[i+1]}" >> "${LS_OUTPUT}"
     # TODO extract arugments from "${BASH_ARGC[@]}" and "${BASH_ARGV[@]}"
     # It requires `shopt -s extdebug'
   done
@@ -97,4 +97,4 @@
 alias LSWARNING='LSLOG 30'
 alias LSERROR='LSLOG 40'
 alias LSCRITICAL='LSLOG 50'
-alias LSLOGSTACK='LSDEBUG Stack trace ; LSCALLSTACK'
\ No newline at end of file
+alias LSLOGSTACK='LSDEBUG Stack trace ; LSCALLSTACK'