diff --git a/src/fp_generator.hpp b/src/fp_generator.hpp
index e902ebd..598c8fd 100644
--- a/src/fp_generator.hpp
+++ b/src/fp_generator.hpp
@@ -12,7 +12,6 @@
 #include <stdio.h>
 #include <assert.h>
 #include <cybozu/exception.hpp>
-#include <cybozu/array.hpp>
 
 #ifdef _MSC_VER
 	#pragma warning(push)