diff --git a/makeflags b/makeflags
index d1f6dcf..f5983cb 100644
--- a/makeflags
+++ b/makeflags
@@ -1,4 +1,4 @@
 CCFLAGS  = -Wall -Wextra -Werror -O3 -march=native -I../include -ggdb -fpic -D_FILE_OFFSET_BITS=64
-# CCFLAGS  = -Wall -Wextra -Werror -O0 -I../include -ggdb -fpic
+# CCFLAGS  = -Wall -Wextra -Werror -O0 -I../include -ggdb -fpic -D_FILE_OFFSET_BITS=64
 CFLAGS   = $(CCFLAGS) -std=c99
 CXXFLAGS = $(CCFLAGS) -std=c++11 -Wold-style-cast