diff --git a/Implementierung/Makefile b/Implementierung/Makefile
index 6771640..5362c73 100644
--- a/Implementierung/Makefile
+++ b/Implementierung/Makefile
@@ -3,7 +3,7 @@
 SRC = src/main.c src/helper.c src/io.c src/md2.c src/md2_impls/md2_common.c src/md2_impls/md2_0.c
 OBJ = ${subst src,build,${SRC:.c=.o}}
 CC = gcc
-CFLAGS = -Ilib -ggdb
+CFLAGS = -Ilib -ggdb -std=c11
 LDFLAGS = 
 
 all: md2