diff --git a/cipher/cipher.c b/cipher/cipher.c
index bf74519c..afe173ad 100644
--- a/cipher/cipher.c
+++ b/cipher/cipher.c
@@ -26,7 +26,6 @@
 #include <cipher.h>
 
 #include "blowfish/blowfish.h"
-#include "idea/idea.h"
 
 #include "net.h"