diff --git a/Makefile/Makefile b/Makefile/Makefile
index a5a0bfc..da06de7 100644
--- a/Makefile/Makefile
+++ b/Makefile/Makefile
@@ -1,4 +1,4 @@
-CXXFLAGS ?= -Werr -Wall
+CPPFLAGS ?= -Werror -Wall
 
 program = test
 sources = $(wildcard *.c)