diff --git a/include/libxml/parser.h b/include/libxml/parser.h
index e9b6bd56..dbd8dac8 100644
--- a/include/libxml/parser.h
+++ b/include/libxml/parser.h
@@ -21,6 +21,9 @@
 #include <libxml/xmlmemory.h>
 #include <libxml/encoding.h>
 #include <libxml/xmlIO.h>
+/* for compatibility */
+#include <libxml/SAX2.h>
+#include <libxml/threads.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/libxml/xmlreader.h b/include/libxml/xmlreader.h
index 4838d8fb..b9f69897 100644
--- a/include/libxml/xmlreader.h
+++ b/include/libxml/xmlreader.h
@@ -18,6 +18,8 @@
 #include <libxml/relaxng.h>
 #include <libxml/xmlschemas.h>
 #endif
+/* for compatibility */
+#include <libxml/parser.h>
 
 #ifdef __cplusplus
 extern "C" {