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-rw-r--r--src/termios/cfmakeraw.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/termios/cfmakeraw.c b/src/termios/cfmakeraw.c
index a3daa09a..c9dddc12 100644
--- a/src/termios/cfmakeraw.c
+++ b/src/termios/cfmakeraw.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
 #include <termios.h>
 
 void cfmakeraw(struct termios *t)