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-rw-r--r--termios/termios.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/termios/termios.h b/termios/termios.h
index 0306d8fb8d..809cb2c208 100644
--- a/termios/termios.h
+++ b/termios/termios.h
@@ -27,9 +27,9 @@
 #ifdef __USE_UNIX98
 /* We need `pid_t'.  */
 # include <bits/types.h>
-# ifndef pid_t
+# ifndef __pid_t_defined
 typedef __pid_t pid_t;
-#  define pid_t pid_t
+#  define __pid_t_defined
 # endif
 #endif