--- src/libdar/Makefile.in.orig	2014-06-15 16:44:07.000000000 +0000
+++ src/libdar/Makefile.in
@@ -337,7 +337,7 @@ AM_LDFLAGS = @LTLIBINTL@  $(LD_PROF)
 lib_LTLIBRARIES = $(MYLIB)
 LIBDAR_MAJOR = `grep LIBDAR_COMPILE_TIME_MAJOR libdar.hpp | cut -f 2 -d "=" | cut -f 1 -d ';' | sed -e 's% %%g'`
 LIBDAR_MEDIUM = `grep LIBDAR_COMPILE_TIME_MEDIUM libdar.hpp | cut -f 2 -d "=" | cut -f 1 -d ';' | sed -e 's% %%g'`
-LIBDAR_MEDIUM_000 = `grep LIBDAR_COMPILE_TIME_MEDIUM libdar.hpp | cut -f 2 -d "=" | cut -f 1 -d ';' | sed -r -e 's% %%g' -e 's%([^0-9]|^)([0-9]{1})([^0-9]|$$)%0\2%' -e 's%([^0-9]|^)([0-9]{2})([^0-9]|$$)%0\2%'`
+LIBDAR_MEDIUM_000 = `grep LIBDAR_COMPILE_TIME_MEDIUM libdar.hpp | cut -f 2 -d "=" | cut -f 1 -d ';' | sed -E -e 's% %%g' -e 's%([^0-9]|^)([0-9]{1})([^0-9]|$$)%0\2%' -e 's%([^0-9]|^)([0-9]{2})([^0-9]|$$)%0\2%'`
 LIBDAR_MINOR = `grep LIBDAR_COMPILE_TIME_MINOR libdar.hpp | cut -f 2 -d "=" | cut -f 1 -d ';' | sed -e 's% %%g'`
 LIBDAR_LIBTOOL_CURRENT = $(LIBDAR_MAJOR)$(LIBDAR_MEDIUM_000)
 LIBDAR_LIBTOOL_REVISION = $(LIBDAR_MINOR)