diff --git a/GNUmakefile b/GNUmakefile
index 873e3a4f..7c03ac95 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -1,4 +1,4 @@
-# $Id: GNUmakefile,v 1.125 2010-04-23 07:38:36 nicm Exp $
+# $Id: GNUmakefile,v 1.126 2010-05-12 19:47:25 nicm Exp $
 #
 # Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
 #
@@ -57,7 +57,7 @@ INSTALLDIR= $(INSTALL) -d
 INSTALLBIN= $(INSTALL) -m 555
 INSTALLMAN= $(INSTALL) -m 444
 
-SRCS= $(shell echo *.c|sed 's|osdep-[a-z0-9]*.c||g')
+SRCS= $(shell echo *.c|LC_ALL=C sed 's|osdep-[a-z0-9]*.c||g')
 include config.mk
 OBJS= $(patsubst %.c,%.o,$(SRCS))
 
diff --git a/Makefile b/Makefile
index 1c25d8ff..61461eaa 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-# $Id: Makefile,v 1.158 2010-04-23 07:38:36 nicm Exp $
+# $Id: Makefile,v 1.159 2010-05-12 19:47:25 nicm Exp $
 #
 # Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
 #
@@ -53,7 +53,7 @@ INSTALLDIR= ${INSTALL} -d
 INSTALLBIN= ${INSTALL} -m 555
 INSTALLMAN= ${INSTALL} -m 444
 
-SRCS!= echo *.c|sed 's|osdep-[a-z0-9]*.c||g'
+SRCS!= echo *.c|LC_ALL=C sed 's|osdep-[a-z0-9]*.c||g'
 .include "config.mk"
 OBJS= ${SRCS:S/.c/.o/}