diff --git a/testsudoers.c b/testsudoers.c
index 206b2916d..1b017c02b 100644
--- a/testsudoers.c
+++ b/testsudoers.c
@@ -31,6 +31,9 @@ static char rcsid[] = "$Id$";
 #include "config.h"
 
 #include <stdio.h>
+#ifdef STDC_HEADERS
+#  include <stdlib.h>
+#endif /* STDC_HEADERS */
 #ifdef HAVE_UNISTD_H
 #  include <unistd.h>
 #endif /* HAVE_UNISTD_H */
diff --git a/tgetpass.c b/tgetpass.c
index bd9dad535..2dc705da6 100644
--- a/tgetpass.c
+++ b/tgetpass.c
@@ -33,6 +33,9 @@ static char rcsid[] = "$Id$";
 #include "config.h"
 
 #include <stdio.h>
+#ifdef STDC_HEADERS
+#include <stdlib.h>
+#endif /* STDC_HEADERS */
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif /* HAVE_UNISTD_H */