diff --git a/sw/source/filter/ww8/sortedarray.hxx b/sw/source/filter/ww8/sortedarray.hxx
index 8b6817cea27f..0c9606050774 100644
--- a/sw/source/filter/ww8/sortedarray.hxx
+++ b/sw/source/filter/ww8/sortedarray.hxx
@@ -20,6 +20,7 @@
 #ifndef INCLUDED_SW_SOURCE_FILTER_WW8_SORTEDARRAY_HXX
 #define INCLUDED_SW_SOURCE_FILTER_WW8_SORTEDARRAY_HXX
 
+#include <osl/diagnose.h>
 #include <algorithm>
 
 //simple template that manages a static [] array by sorting at construction