diff --git a/cde/programs/dtscreen/dtscreen.c b/cde/programs/dtscreen/dtscreen.c
index 5f8c4a199..6c2278650 100644
--- a/cde/programs/dtscreen/dtscreen.c
+++ b/cde/programs/dtscreen/dtscreen.c
@@ -109,6 +109,7 @@
 nl_catd  scmc_catd;   /* Cat descriptor for scmc conversion */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <signal.h>
 #include <string.h>