diff --git a/src/fmtseq.cpp b/src/fmtseq.cpp
index 389f254..a54d143 100644
--- a/src/fmtseq.cpp
+++ b/src/fmtseq.cpp
@@ -19,8 +19,6 @@
 #include "fmtseq.h"
 #include "arcfour.h"
 
-#include <iostream>
-
 using namespace fmtseq;
 
 void prepare_keygen (arcfour<byte>& kg, const std::vector<byte>&SK, uint idx)