diff --git a/backend/dvi/mdvi-lib/private.h b/backend/dvi/mdvi-lib/private.h
index 139a1259..a071f78b 100644
--- a/backend/dvi/mdvi-lib/private.h
+++ b/backend/dvi/mdvi-lib/private.h
@@ -32,6 +32,7 @@
 #  endif
 #endif
 
+#include <kpathsea/c-auto.h>
 #include <kpathsea/debug.h>
 #include <kpathsea/tex-file.h>
 #include <kpathsea/tex-glyph.h>