diff --git a/pear/Makefile.in b/pear/Makefile.in
index c4e92fe2857..8f3f575eb19 100644
--- a/pear/Makefile.in
+++ b/pear/Makefile.in
@@ -74,6 +74,9 @@ HEADER_DIRS = \
 	Zend \
 	TSRM \
 	ext/standard \
+	ext/xml \
+	ext/xml/expat/xmlparse \
+	ext/xml/expat/xmltok \
 	main \
 	regex