diff --git a/sys/include/crypto/3des.h b/sys/include/crypto/3des.h
index 658110acb4..88d3fa56be 100644
--- a/sys/include/crypto/3des.h
+++ b/sys/include/crypto/3des.h
@@ -22,7 +22,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <stdint.h>
-#include "assert.h"
+
 #include "crypto/ciphers.h"
 
 #ifndef THREEDES_H_