diff --git a/demos/firework.c b/demos/firework.c
index 20ac6768..88151401 100644
--- a/demos/firework.c
+++ b/demos/firework.c
@@ -1,9 +1,5 @@
-#include <stdio.h>
-#include <signal.h>
 #include <curses.h>
-#include <ctype.h>
 #include <stdlib.h>
-#include <sys/types.h>
 #include <time.h>
 
 #define DELAYSIZE 200
diff --git a/demos/ozdemo.c b/demos/ozdemo.c
index 7fcd40bc..47bd8cac 100644
--- a/demos/ozdemo.c
+++ b/demos/ozdemo.c
@@ -5,7 +5,6 @@
  *  Hacks by jbuhler@cs.washington.edu on 12/29/96
  */
 
-#include <stdio.h>
 #include <signal.h>
 #include <string.h>
 #include <curses.h>
diff --git a/demos/xmas.c b/demos/xmas.c
index 62b4842a..e1c02c03 100644
--- a/demos/xmas.c
+++ b/demos/xmas.c
@@ -45,7 +45,6 @@
 /******************************************************************************/
 
 #include <curses.h>
-#include <signal.h>
 
 void lil(WINDOW *);
 void midtop(WINDOW *);