diff --git a/cde/programs/dthelp/parser/canon1/Makefile.am b/cde/programs/dthelp/parser/canon1/Makefile.am
index 71f20bf5d..063a3f48e 100644
--- a/cde/programs/dthelp/parser/canon1/Makefile.am
+++ b/cde/programs/dthelp/parser/canon1/Makefile.am
@@ -1,3 +1,5 @@
 MAINTAINERCLEANFILES =Makefile.in
 
+.NOTPARALLEL:
+
 SUBDIRS = util build eltdef helptag parser