diff --git a/Makefile b/Makefile

index a0968af..46d10f8 100644

--- a/Makefile

+++ b/Makefile

@@ -18,7 +18,7 @@ VERSION-FILE: FORCE

 	@$(SHELL_PATH) ./GEN-VERSION-FILE

 -include VERSION-FILE

-CFLAGS = -g -O2 -Wall -W -Werror=format-security

+CFLAGS = -g -O2 -Wall -W -Werror=format-security -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64

 LDFLAGS =

 IPTRAF_CFLAGS := -std=gnu99 -D_GNU_SOURCE

 ALL_CFLAGS = $(CPPFLAGS) $(CFLAGS) $(IPTRAF_CFLAGS)