diff --git a/usr.sbin/jail/command.c b/usr.sbin/jail/command.c
index 53f4f80862ce..95f2c735dff5 100644
--- a/usr.sbin/jail/command.c
+++ b/usr.sbin/jail/command.c
@@ -374,7 +374,7 @@ run_command(struct cfjail *j)
 			argc = 4;
 		}
 
-		if (!down) {
+		if (!down && extrap != NULL) {
 			for (cs = strtok(extrap, " "); cs;
 			     cs = strtok(NULL, " ")) {
 				size_t len = strlen(cs) + 1;