diff --git a/epwing.cc b/epwing.cc
index 81166fa9..3a2fdeb1 100644
--- a/epwing.cc
+++ b/epwing.cc
@@ -23,7 +23,6 @@
 #include "utf8.hh"
 #include "filetype.hh"
 #include "ftshelpers.hh"
-#include "btreeidx.hh"
 
 namespace Epwing {