diff --git a/include/ntruhe.h b/include/ntruhe.h
index b822b27..46eea2b 100644
--- a/include/ntruhe.h
+++ b/include/ntruhe.h
@@ -173,6 +173,13 @@ class SchemeNTRU
      */
     void xor_gate(Ctxt_NTRU& ct_res, const Ctxt_NTRU& ct1, const Ctxt_NTRU& ct2) const;
 
+    /**
+    * Computes the NOT gate of a given ciphertext ct
+    * @param[out] ct_res encryption of the outuput of the NOT gate
+    * @param[in] ct encryption of the input bit
+    */
+    void not_gate(Ctxt_NTRU& ct_res, const Ctxt_NTRU& ct) const;
+
 };
 
 #endif
diff --git a/src/ntruhe.cpp b/src/ntruhe.cpp
index 5e53391..d4868d4 100644
--- a/src/ntruhe.cpp
+++ b/src/ntruhe.cpp
@@ -296,4 +296,8 @@ void SchemeNTRU::xor_gate(Ctxt_NTRU& ct_res, const Ctxt_NTRU& ct1, const Ctxt_NT
     bootstrap(ct_res);
 }
 
+void SchemeNTRU::not_gate(Ctxt_NTRU& ct_res, const Ctxt_NTRU& ct) const
+{
+    nand_gate(ct_res, ct, ct);
+}