1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 6ebe7de..e8a1323 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 opendeco: opendeco.c deco.c deco.h schedule.c schedule.h output.c output.h
-	gcc -O3 -lm -Wall -Werror opendeco.c deco.c schedule.c output.c -o opendeco
+	gcc --std=c99 -pedantic -Wall -Werror -O3 -lm opendeco.c deco.c schedule.c output.c -o opendeco
 
 run: opendeco
 	./opendeco