diff --git a/include/prereq.mk b/include/prereq.mk
index 4a55c89ffc..45ee77e9e6 100644
--- a/include/prereq.mk
+++ b/include/prereq.mk
@@ -39,6 +39,7 @@ define Require
     CHECK_$(1):=1
 
     .SILENT: prereq-$(1) check-$(1)
+    .NOTPARALLEL:
   endif
 endef
 
@@ -59,4 +60,3 @@ define RequireHeader
   $$(eval $$(call Require,$(1),$(2)))
 endef
 
-.NOTPARALLEL: