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-rw-r--r--readline/sysdep-norm.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/readline/sysdep-norm.h b/readline/sysdep-norm.h
index 0986659..158b504 100644
--- a/readline/sysdep-norm.h
+++ b/readline/sysdep-norm.h
@@ -20,3 +20,9 @@ extern char *alloca ();
#include <dirent.h>
typedef struct dirent dirent;
+
+/* SVR4 systems should use <termios.h> rather than <termio.h>. */
+
+#if defined (USGr4)
+#define _POSIX_VERSION
+#endif