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-rw-r--r--config.mk2
1 files changed, 1 insertions, 1 deletions
diff --git a/config.mk b/config.mk
index ca89fd6..c0d466b 100644
--- a/config.mk
+++ b/config.mk
@@ -17,7 +17,7 @@ INCS = -I${X11INC}
LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS}
# flags
-CPPFLAGS = -D_BSD_SOURCE -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
+CPPFLAGS = -D_BSD_SOURCE -D_POSIX_C_SOURCE=200809L -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
CFLAGS = -ansi -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
LDFLAGS = -s ${LIBS}