diff -ur mathomatic-16.0.1.old/m4/matho mathomatic-16.0.1/m4/matho
--- mathomatic-16.0.1.old/m4/matho	2012-07-26 13:19:40.000000000 +0000
+++ mathomatic-16.0.1/m4/matho	2012-07-26 13:23:21.684431935 +0000
@@ -25,8 +25,8 @@
 elif [ -x ../mathomatic ]
 then
 	echo Running ../mathomatic
-	m4 -eP -- "$MFUNCTIONS" "$@" - | ../mathomatic $MOPTIONS
+	m4 -iP -- "$MFUNCTIONS" "$@" - | ../mathomatic $MOPTIONS
 else
 	echo Running mathomatic
-	m4 -eP -- "$MFUNCTIONS" "$@" - | mathomatic $MOPTIONS
+	m4 -iP -- "$MFUNCTIONS" "$@" - | mathomatic $MOPTIONS
 fi
diff -ur mathomatic-16.0.1.old/makefile mathomatic-16.0.1/makefile
--- mathomatic-16.0.1.old/makefile	2012-07-26 13:22:01.245952479 +0000
+++ mathomatic-16.0.1/makefile	2012-07-26 13:23:55.875785609 +0000
@@ -243,7 +243,7 @@
 	echo '  exit 1' >>$(M4SCRIPTPATH)
 	echo 'fi' >>$(M4SCRIPTPATH)
 	echo >>$(M4SCRIPTPATH)
-	echo '$(M4) -eP -- $(mathdatadir)/m4/functions.m4 "$$@" - | mathomatic -ru -s-1' >>$(M4SCRIPTPATH)
+	echo '$(M4) -iP -- $(mathdatadir)/m4/functions.m4 "$$@" - | mathomatic -ru -s-1' >>$(M4SCRIPTPATH)
 	chmod 0755 $(M4SCRIPTPATH)
 	$(INSTALL_PROGRAM) m4/rmath $(DESTDIR)$(bindir)
 	$(INSTALL_DATA) rmath.1 $(DESTDIR)$(mandir)/man1