diff --git a/ext/libxml/php_libxml2.def b/ext/libxml/php_libxml2.def
index 42a939ebb8d..905dbf386be 100644
--- a/ext/libxml/php_libxml2.def
+++ b/ext/libxml/php_libxml2.def
@@ -1544,3 +1544,5 @@ xmlXPtrNewRangePointNode
 xmlXPtrNewRangePoints
 xmlXPtrRangeToFunction
 xmlXPtrWrapLocationSet
+xmlBufContent
+xmlBufUse