diff --git a/src/acconfig.h b/src/acconfig.h
index 2e46985..1b174bb 100644
--- a/src/acconfig.h
+++ b/src/acconfig.h
@@ -140,6 +140,7 @@
  *        Syntax: screen //telnet host [port]
  * define RXVT_OSC if you want support for rxvts special
  *        change fgcolor/bgcolor/bgpicture sequences
+ * define MULTIINPUT if you want to type into multiple windows at once
  */
 #undef SIMPLESCREEN
 #ifndef SIMPLESCREEN
@@ -166,6 +167,7 @@
 #undef BUILTIN_TELNET
 #undef RXVT_OSC
 #undef COLORS256
+#undef MULTIINPUT
 
 
 /*
diff --git a/src/comm.c b/src/comm.c
index 5f4af8a..cbbafae 100644
--- a/src/comm.c
+++ b/src/comm.c
@@ -238,6 +238,9 @@ struct comm comms[RC_LAST + 1] =
   { "mousetrack",	NEED_DISPLAY | ARGS_01 },
   { "msgminwait",	ARGS_1 },
   { "msgwait",		ARGS_1 },
+#ifdef MULTIINPUT
+  { "multiinput",	ARGS_01 },
+#endif
 #ifdef MULTIUSER
   { "multiuser",	ARGS_1 },
 #endif
diff --git a/src/configure.in b/src/configure.in
index e9ca223..9e84bb6 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -1281,6 +1281,10 @@ AC_ARG_ENABLE(rxvt_osc, [  --enable-rxvt_osc       enable support for rxvt OSC c
 if test "$enable_rxvt_osc" = "yes"; then
   AC_DEFINE(RXVT_OSC)
 fi
+AC_ARG_ENABLE(multiinput, [  --enable-multiinput   enable multiple windows input support ])
+if test "$enable_multiinput" = "yes"; then
+  AC_DEFINE(MULTIINPUT)
+fi
 
 dnl
 dnl    ****  the end  ****
diff --git a/src/process.c b/src/process.c
index 70e59f3..0b6e18b 100644
--- a/src/process.c
+++ b/src/process.c
@@ -1237,6 +1237,31 @@ int key;
       else if (queryflag >= 0)
 	queryflag = -1;	/* ParseWinNum already prints out an appropriate error message. */
       break;
+#ifdef MULTIINPUT
+    case RC_MULTIINPUT:
+      if (!*args)
+        {
+	  if (!fore)
+	    OutputMsg(0, "multiinput needs a window");
+	  else 
+	    fore->w_miflag = (fore->w_miflag) ? 0 : 1;
+	}
+      else
+        {
+          if (ParseWinNum(act, &n) == 0)
+	    {
+	      struct win *p;
+              if ((p = wtab[n]) == 0)
+                {
+                  ShowWindows(n);
+                  break;
+                }
+              else
+	        p->w_miflag = (p->w_miflag) ? 0 : 1;
+            }
+	}
+      break;
+#endif
 #ifdef AUTO_NUKE
     case RC_DEFAUTONUKE:
       if (ParseOnOff(act, &defautonuke) == 0 && msgok)
@@ -5494,6 +5519,10 @@ struct win *p;
     }
   if (p->w_ptyfd < 0 && p->w_type != W_TYPE_GROUP)
     *s++ = 'Z';
+#ifdef MULTIINPUT
+  if (p->w_miflag)
+    *s++ = '>';
+#endif
   *s = 0;
   return s;
 }
diff --git a/src/window.c b/src/window.c
index 1c6f5b6..8e7bbb9 100644
--- a/src/window.c
+++ b/src/window.c
@@ -1950,6 +1950,19 @@ char *data;
       debug2("writing %d bytes to win %d\n", p->w_inlen, p->w_number);
       if ((len = write(ev->fd, p->w_inbuf, p->w_inlen)) <= 0)
 	len = p->w_inlen;	/* dead window */
+
+#ifdef MULTIINPUT
+      struct win *win;
+      for (win = windows; win; win = win->w_next)
+        {
+          if (win != p && p->w_miflag && win->w_miflag)
+	    {
+              if ((len = write(win->w_ptyfd, p->w_inbuf, p->w_inlen)) <= 0)
+	        len = win->w_inlen;	/* dead window */
+	    }
+        }
+#endif
+
       if ((p->w_inlen -= len))
 	bcopy(p->w_inbuf + len, p->w_inbuf, p->w_inlen);
     }
diff --git a/src/window.h b/src/window.h
index 7311ecb..a1c134a 100644
--- a/src/window.h
+++ b/src/window.h
@@ -299,6 +299,9 @@ struct win
 #else
   int w_exitstatus;
 #endif
+#ifdef MULTIINPUT
+  int w_miflag;			/* multiple windows input flag */
+#endif
 };