diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index 953d5c75e5..315ce2c7cb 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -379,7 +379,7 @@ static void update_text(char *buf, size_t start, size_t end, void *_data)
 				data->targets[k] = pos->target;
 				k++;
 			} else {
-				strcpy(header, "   ");
+				sprintf(header, "   ");
 			}
 
 			memcpy(buf + pos->offset, header, sizeof(header) - 1);