diff --git a/appl/ftp/ftp/security.c b/appl/ftp/ftp/security.c
index 9b2a3534a..11e553562 100644
--- a/appl/ftp/ftp/security.c
+++ b/appl/ftp/ftp/security.c
@@ -741,7 +741,7 @@ sec_login(char *host)
 
 	tmp = realloc(app_data, (*m)->size);
 	if (tmp == NULL) {
-	    warnx ("realloc %u failed", (*m)->size);
+	    warnx ("realloc %lu failed", (unsigned long)(*m)->size);
 	    return -1;
 	}
 	app_data = tmp;
diff --git a/appl/rsh/rsh.c b/appl/rsh/rsh.c
index a5d0d343c..af1a00889 100644
--- a/appl/rsh/rsh.c
+++ b/appl/rsh/rsh.c
@@ -639,7 +639,7 @@ construct_command (char **res, int argc, char **argv)
     len = max (1, len);
     tmp = malloc (len);
     if (tmp == NULL)
-	errx (1, "malloc %u failed", len);
+	errx (1, "malloc %lu failed", (unsigned long)len);
 
     *tmp = '\0';
     for (i = 0; i < argc - 1; ++i) {