1 files changed, 3 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index dbdefd0..66592c0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
 CC      := gcc
 LD      := $(CC)
-CFLAGS  := -Wall -Wextra -std=c99 -pedantic $(shell sdl2-config --cflags)
+CFLAGS  := -Wall -Wextra -std=c99 -pedantic \
+           -D_POSIX_C_SOURCE=200809L $(shell sdl2-config --cflags)
+# -D_POSIX_C_SOURCE is only used by DEVMODE
 LDFLAGS := $(shell sdl2-config --libs) -lSDL2_gfx -lSDL2_image -lSDL2_mixer
 SRC     := $(wildcard *.c)
 OBJ     := $(patsubst %.c,%.o,$(SRC))