diff --git a/init/main.c b/init/main.c
index f27e8510b155..3f3dc2a8bd86 100644
--- a/init/main.c
+++ b/init/main.c
@@ -640,6 +640,8 @@ static void __init setup_command_line(char *command_line)
 	if (!saved_command_line)
 		panic("%s: Failed to allocate %zu bytes\n", __func__, len + ilen);
 
+	len = xlen + strlen(command_line) + 1;
+
 	static_command_line = memblock_alloc(len, SMP_CACHE_BYTES);
 	if (!static_command_line)
 		panic("%s: Failed to allocate %zu bytes\n", __func__, len);