diff --git a/src/ecdh_helper.h b/src/ecdh_helper.h
index 3b8c38c..edc70de 100644
--- a/src/ecdh_helper.h
+++ b/src/ecdh_helper.h
@@ -108,6 +108,7 @@ public:
             mbedtls_entropy_free(&entropy);
             memset(shared_secret, 0, sizeof(shared_secret));
             memset(aes_key, 0, sizeof(aes_key));
+            memset(public_key, 0, sizeof(public_key));
             initialized = false;
         }
     }