diff --git a/Cantera/cxx/src/Makefile.am b/Cantera/cxx/src/Makefile.am
index 30c3558c7..fcd35b991 100644
--- a/Cantera/cxx/src/Makefile.am
+++ b/Cantera/cxx/src/Makefile.am
@@ -23,6 +23,6 @@ __top_builddir__build_lib_libctcxx_includedir = $(prefix)/include
 # header file accumulation
 all:
 	@echo copying headers $<
-	cp -p ../include/*.h $(top_builddir)/build/include/
+	cp -p *.h $(top_builddir)/build/include/
 
 CLEANFILES = *.o