1 files changed, 3 insertions, 3 deletions
diff --git a/Makefile b/Makefile
index 84da2c0..076fd55 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,10 @@
 all: lz4demo64 lz4demo32 
 
-lz4demo64: lz4.c lz4.h bench.c lz4demo.c  
-	gcc      -O3 -I. -std=c99 -Wall -W -Wno-implicit-function-declaration lz4.c bench.c lz4demo.c -o lz4demo64.exe
+lz4demo64: lz4.c lz4.h bench.c lz4demo.c
+	gcc      -O3 -I. -std=c99 -Wall -W -Wundef -Wno-implicit-function-declaration lz4.c bench.c lz4demo.c -o lz4demo64.exe
 
 lz4demo32: lz4.c lz4.h bench.c lz4demo.c
-	gcc -m32 -O3 -I. -std=c99 -Wall -W -Wno-implicit-function-declaration lz4.c bench.c lz4demo.c -o lz4demo32.exe
+	gcc -m32 -O3 -I. -std=c99 -Wall -W -Wundef -Wno-implicit-function-declaration lz4.c bench.c lz4demo.c -o lz4demo32.exe
 
 clean:
 	rm -f core *.o lz4demo32.exe lz4demo64.exe