diff --git a/edef.h b/edef.h
index fa9c892..8b5c771 100644
--- a/edef.h
+++ b/edef.h
@@ -484,3 +484,10 @@ extern void putline(int row, int col, char *buf);
 extern void getscreensize(int *widthp, int *heightp);
 extern void sizesignal(int signr);
 extern int newscreensize(int h, int w);
+
+/* region.c */
+extern int killregion(int f, int n);
+extern int copyregion(int f, int n);
+extern int lowerregion(int f, int n);
+extern int upperregion(int f, int n);
+extern int getregion(REGION *rp);
diff --git a/region.c b/region.c
index ab83fca..4be5025 100644
--- a/region.c
+++ b/region.c
@@ -19,7 +19,7 @@
  * Move "." to the start, and kill the characters.
  * Bound to "C-W".
  */
-killregion(f, n)
+int killregion(int f, int n)
 {
 	register int s;
 	REGION region;
@@ -42,7 +42,7 @@ killregion(f, n)
  * at all. This is a bit like a kill region followed
  * by a yank. Bound to "M-W".
  */
-copyregion(f, n)
+int copyregion(int f, int n)
 {
 	register LINE *linep;
 	register int loffs;
@@ -80,7 +80,7 @@ copyregion(f, n)
  * redisplay is done in all buffers. Bound to
  * "C-X C-L".
  */
-lowerregion(f, n)
+int lowerregion(int f, int n)
 {
 	register LINE *linep;
 	register int loffs;
@@ -117,7 +117,7 @@ lowerregion(f, n)
  * redisplay is done in all buffers. Bound to
  * "C-X C-L".
  */
-upperregion(f, n)
+int upperregion(int f, int n)
 {
 	register LINE *linep;
 	register int loffs;
@@ -157,8 +157,7 @@ upperregion(f, n)
  * an "ABORT" status; we might make this have the
  * conform thing later.
  */
-getregion(rp)
-register REGION *rp;
+int getregion(REGION *rp)
 {
 	register LINE *flp;
 	register LINE *blp;