diff --git a/cde/programs/dtscreen/flame.c b/cde/programs/dtscreen/flame.c
index 4de3d2512..9ba56a50b 100644
--- a/cde/programs/dtscreen/flame.c
+++ b/cde/programs/dtscreen/flame.c
@@ -44,6 +44,7 @@
 
 #include "dtscreen.h"
 #include <math.h>
+#include <stdlib.h>
 
 #define MAXTOTAL	10000
 #define MAXBATCH	10
diff --git a/cde/programs/dtscreen/hopalong.c b/cde/programs/dtscreen/hopalong.c
index 539fb79c4..8fd3cc1e0 100644
--- a/cde/programs/dtscreen/hopalong.c
+++ b/cde/programs/dtscreen/hopalong.c
@@ -52,6 +52,7 @@
 
 #include "dtscreen.h"
 #include <math.h>
+#include <stdlib.h>
 
 typedef struct {
     int         centerx;
diff --git a/cde/programs/dtscreen/image.c b/cde/programs/dtscreen/image.c
index da6ff0327..d35625ba8 100644
--- a/cde/programs/dtscreen/image.c
+++ b/cde/programs/dtscreen/image.c
@@ -42,6 +42,7 @@
 
 #include "dtscreen.h"
 #include "xlogo.bit"
+#include <stdlib.h>
 
 static XImage logo = {
     0, 0,			/* width, height */
diff --git a/cde/programs/dtscreen/life.c b/cde/programs/dtscreen/life.c
index a2d6d1157..7d5eef58e 100644
--- a/cde/programs/dtscreen/life.c
+++ b/cde/programs/dtscreen/life.c
@@ -47,6 +47,7 @@
 
 #include "dtscreen.h"
 #include "lifeicon.bit"
+#include <stdlib.h>
 
 static XImage logo = {
     0, 0,			/* width, height */
diff --git a/cde/programs/dtscreen/pyro.c b/cde/programs/dtscreen/pyro.c
index e08c2b222..0501f55fe 100644
--- a/cde/programs/dtscreen/pyro.c
+++ b/cde/programs/dtscreen/pyro.c
@@ -50,6 +50,8 @@
 
 #include "dtscreen.h"
 #include <math.h>
+#include <stdlib.h>
+
 #define TWOPI 6.2831853
 
 /* Define this >1 to get small rectangles instead of points */
diff --git a/cde/programs/dtscreen/qix.c b/cde/programs/dtscreen/qix.c
index 9aa454594..e497bdc9e 100644
--- a/cde/programs/dtscreen/qix.c
+++ b/cde/programs/dtscreen/qix.c
@@ -49,6 +49,7 @@
  */
 
 #include "dtscreen.h"
+#include <stdlib.h>
 
 typedef struct {
     int         x;
diff --git a/cde/programs/dtscreen/rotor.c b/cde/programs/dtscreen/rotor.c
index f6b3694f4..ead68a8e7 100644
--- a/cde/programs/dtscreen/rotor.c
+++ b/cde/programs/dtscreen/rotor.c
@@ -47,6 +47,7 @@
 
 #include <stdio.h>
 #include <math.h>
+#include <stdlib.h>
 #include "dtscreen.h"
 
 #define SAVE 		100	/* this is a good constant to tweak */
diff --git a/cde/programs/dtscreen/swarm.c b/cde/programs/dtscreen/swarm.c
index c3a6bc3dc..f72d42ac7 100644
--- a/cde/programs/dtscreen/swarm.c
+++ b/cde/programs/dtscreen/swarm.c
@@ -38,6 +38,7 @@
  * 31-Aug-90: Adapted from xswarm by Jeff Butterworth. (butterwo@ncsc.org)
  */
 
+#include <stdlib.h>
 #include "dtscreen.h"
 
 #define TIMES	4		/* number of time positions recorded */
diff --git a/cde/programs/dtscreen/worm.c b/cde/programs/dtscreen/worm.c
index 10d4cad47..bdf014139 100644
--- a/cde/programs/dtscreen/worm.c
+++ b/cde/programs/dtscreen/worm.c
@@ -53,7 +53,8 @@
  */
 
 #include "dtscreen.h"
-#include	<math.h>
+#include <math.h>
+#include <stdlib.h>
 
 #define MAXCOLORS 64
 #define MAXWORMS 64