1 files changed, 1 insertions, 0 deletions
diff --git a/src/List.c b/src/List.c
index b491000..6b9fe13 100644
--- a/src/List.c
+++ b/src/List.c
@@ -39,6 +39,7 @@ in this Software without prior written authorization from the X Consortium.
 #endif
 #include <X11/Xaw3d/Xaw3dP.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <ctype.h>
 #include <X11/IntrinsicP.h>
 #include <X11/StringDefs.h>