diff --git a/Makefile b/Makefile
index 2e16a06b..acd600f1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,6 @@
 #  copyright (c) 2010 Espressif System
 #
+.NOTPARALLEL:
 ifndef PDIR
 
 endif