diff --git a/Makefile b/Makefile
index 4939168..7524ad2 100644
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@ OBJ=basic.o bind.o buffer.o crypt.o display.o eval.o exec.o \
 	termio.o window.o word.o names.o globals.o \
 	wrapper.o utf8.o
 
-HDR=ebind.h edef.h efunc.h estruct.h version.h
+HDR=ebind.h edef.h efunc.h estruct.h fileio.h version.h
 
 # DO NOT ADD OR MODIFY ANY LINES ABOVE THIS -- make source creates them
 
@@ -139,7 +139,7 @@ display.o: display.c estruct.h edef.h utf8.h version.h
 eval.o: eval.c estruct.h edef.h version.h
 exec.o: exec.c estruct.h edef.h
 file.o: file.c estruct.h edef.h
-fileio.o: fileio.c estruct.h edef.h
+fileio.o: fileio.c fileio.h estruct.h edef.h
 ibmpc.o: ibmpc.c estruct.h edef.h
 input.o: input.c estruct.h edef.h
 isearch.o: isearch.c estruct.h edef.h
diff --git a/efunc.h b/efunc.h
index e24bbba..e5cdace 100644
--- a/efunc.h
+++ b/efunc.h
@@ -221,12 +221,7 @@ extern int filename(int f, int n);
 extern int ifile(char *fname);
 
 /* fileio.c */
-int ffropen( const char *fn) ;
-extern int ffwopen(char *fn);
-extern int ffclose(void);
-extern int ffputline(char *buf, int nbuf);
-extern int ffgetline(void);
-extern int fexist(char *fname);
+#include "fileio.h"
 
 /* exec.c */
 extern int namedcmd(int f, int n);
diff --git a/fileio.c b/fileio.c
index eeadc05..0211c5f 100644
--- a/fileio.c
+++ b/fileio.c
@@ -1,3 +1,7 @@
+/* fileio.c -- implements fileio.h */
+
+#include "fileio.h"
+
 /*	FILEIO.C
  *
  * The routines in this file read and write ASCII files from the disk. All of
@@ -6,9 +10,9 @@
  *	modified by Petri Kutvonen
  */
 
-#include        <stdio.h>
+#include	<stdio.h>
 #include	"estruct.h"
-#include        "edef.h"
+#include	"edef.h"
 #include	"efunc.h"
 
 static FILE *ffp;			/* File pointer, all functions. */
@@ -19,7 +23,7 @@ static int eofflag;			/* end-of-file flag */
  */
 int ffropen( const char *fn)
 {
-	if ((ffp = fopen(fn, "r")) == NULL)
+	if ((ffp = fopen(fn, "rt")) == NULL)
 		return FIOFNF;
 	eofflag = FALSE;
 	return FIOSUC;
@@ -29,7 +33,7 @@ int ffropen( const char *fn)
  * Open a file for writing. Return TRUE if all is well, and FALSE on error
  * (cannot create).
  */
-int ffwopen(char *fn)
+int ffwopen( const char *fn)
 {
 #if     VMS
 	int fd;
@@ -205,7 +209,7 @@ int ffgetline(void)
  *
  * char *fname;		file to check for existance
  */
-int fexist(char *fname)
+int fexist( const char *fname)
 {
 	FILE *fp;
 
diff --git a/fileio.h b/fileio.h
new file mode 100644
index 0000000..d27008e
--- /dev/null
+++ b/fileio.h
@@ -0,0 +1,11 @@
+#ifndef _FILEIO_H_
+#define _FILEIO_H_
+
+int fexist( const char *fname) ;
+int ffclose( void) ;
+int ffgetline( void) ;
+int ffputline( char *buf, int nbuf) ;
+int ffropen( const char *fn) ;
+int ffwopen( const char *fn) ;
+
+#endif