diff --git a/src/writer/defaultIndexData.h b/src/writer/defaultIndexData.h
index 02e6478e..12891615 100644
--- a/src/writer/defaultIndexData.h
+++ b/src/writer/defaultIndexData.h
@@ -23,6 +23,7 @@
 #include <zim/writer/item.h>
 #include <zim/tools.h>
 
+#include "config.h"
 #if defined(ENABLE_XAPIAN)
 #include "xapian/myhtmlparse.h"
 #endif