diff --git a/ChangeLog b/ChangeLog
index 9cd993d..aecdd4a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,4 @@
+2024-02-04: Fix: missing header with libxml2 >= 2.12
 2024-02-04: Max index count value is too low for some dictionaries
 2023-08-10: Fix CMake debug build with MSVC, fixes #46
 2023-07-11: Clean up unused value
diff --git a/src/opf.c b/src/opf.c
index e1d208c..35262bb 100644
--- a/src/opf.c
+++ b/src/opf.c
@@ -24,6 +24,7 @@
 #pragma clang diagnostic ignored "-Wdocumentation"
 #endif
 #include <libxml/encoding.h>
+#include <libxml/parser.h>
 #include <libxml/xmlwriter.h>
 #ifdef __clang__
 #pragma clang diagnostic pop