diff --git a/include/fopen-bin.h b/include/fopen-bin.h
new file mode 100644
index 0000000000..b868f63d46
--- /dev/null
+++ b/include/fopen-bin.h
@@ -0,0 +1,27 @@
+/* Macros for the 'type' part of an fopen, freopen or fdopen. 
+
+	<Read|Write>[Update]<Binary file|text file>
+
+   This version is for "binary" systems, where text and binary files are
+   different.  An example is Mess-Dose.  Many Unix systems could also
+   cope with a "b" in the string, indicating binary files, but some reject this
+   (and thereby don't conform to ANSI C, but what else is new?).
+
+   This file is designed for inclusion by host-dependent .h files.  No
+   user application should include it directly, since that would make
+   the application unable to be configured for both "same" and "binary"
+   variant systems.  */
+
+#define FOPEN_RB	"rb"
+#define FOPEN_WB 	"wb"
+#define FOPEN_AB 	"ab"
+#define FOPEN_RUB 	"r+b"
+#define FOPEN_WUB 	"w+b"
+#define FOPEN_AUB 	"a+b"
+
+#define FOPEN_RT	"r"
+#define FOPEN_WT 	"w"
+#define FOPEN_AT 	"a"
+#define FOPEN_RUT 	"r+"
+#define FOPEN_WUT 	"w+"
+#define FOPEN_AUT 	"a+"
diff --git a/include/fopen-same.h b/include/fopen-same.h
new file mode 100644
index 0000000000..0f37529d33
--- /dev/null
+++ b/include/fopen-same.h
@@ -0,0 +1,27 @@
+/* Macros for the 'type' part of an fopen, freopen or fdopen. 
+
+	<Read|Write>[Update]<Binary file|text file>
+
+   This version is for "same" systems, where text and binary files are
+   the same.  An example is Unix.  Many Unix systems could also add a
+   "b" to the string, indicating binary files, but some reject this
+   (and thereby don't conform to ANSI C, but what else is new?).
+
+   This file is designed for inclusion by host-dependent .h files.  No
+   user application should include it directly, since that would make
+   the application unable to be configured for both "same" and "binary"
+   variant systems.  */
+
+#define FOPEN_RB	"r"
+#define FOPEN_WB 	"w"
+#define FOPEN_AB 	"a"
+#define FOPEN_RUB 	"r+"
+#define FOPEN_WUB 	"w+"
+#define FOPEN_AUB 	"a+"
+
+#define FOPEN_RT	"r"
+#define FOPEN_WT 	"w"
+#define FOPEN_AT 	"a"
+#define FOPEN_RUT 	"r+"
+#define FOPEN_WUT 	"w+"
+#define FOPEN_AUT 	"a+"