diff --git a/sys/cam/ctl/ctl.c b/sys/cam/ctl/ctl.c
index 5b67b8f0a76..718164f3245 100644
--- a/sys/cam/ctl/ctl.c
+++ b/sys/cam/ctl/ctl.c
@@ -2074,6 +2074,11 @@ ctl_copyin_args(int num_be_args, struct ctl_be_arg *be_args,
 	if (args == NULL)
 		goto bailout;
 
+	for (i = 0; i < num_be_args; i++) {
+		args[i].kname = NULL;
+		args[i].kvalue = NULL;
+	}
+
 	for (i = 0; i < num_be_args; i++) {
 		uint8_t *tmpptr;