--- a/CPP/7zip/Compress/LZMA_Alone/makefile.gcc
+++ b/CPP/7zip/Compress/LZMA_Alone/makefile.gcc
@@ -3,7 +3,7 @@ CXX = g++ -O2 -Wall
 CXX_C = gcc -O2 -Wall
 LIB = -lm
 RM = rm -f
-CFLAGS = -c
+CFLAGS = -c -D_FILE_OFFSET_BITS=64
 
 ifdef SystemDrive
 IS_MINGW = 1
