1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index a2be56b..611ea8d 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ CC = gcc
 
 INCFLAGS  = -Isrc
 
-CCFLAGS  = -std=gnu99 -Wall -Wextra -pedantic -O2
+CCFLAGS  = -std=c99 -Wall -Wextra -pedantic -O2 -D_DEFAULT_SOURCE
 CCFLAGS += $(INCFLAGS)
 
 LDFLAGS += $(INCFLAGS)