diff --git a/libs/crypt/picrypt.cpp b/libs/crypt/picrypt.cpp
index 38b38250..e5c79041 100644
--- a/libs/crypt/picrypt.cpp
+++ b/libs/crypt/picrypt.cpp
@@ -24,7 +24,8 @@
 
 #define PICRYPT_DISABLED_WARNING piCout << "[PICrypt]" << "Warning: PICrypt is disabled, to enable install sodium library and rebuild pip";
 
-const char hash_def_key[] = "=picryptpicrypt=";
+const char hash_def_key[] = "_picrypt_\0\0\0\0\0\0\0";
+const int hash_def_key_size = 9;
 
 
 PICrypt::PICrypt() {
@@ -52,7 +53,7 @@ PIByteArray PICrypt::setKey(const PIString & secret) {
 #ifdef PIP_CRYPT
 	hash.resize(crypto_generichash_BYTES);
 	PIByteArray s(secret.data(), secret.size());
-	crypto_generichash(hash.data(), hash.size(), s.data(), s.size(), (const uchar*)hash_def_key, sizeof(hash_def_key) - 1);
+	crypto_generichash(hash.data(), hash.size(), s.data(), s.size(), (const uchar*)hash_def_key, hash_def_key_size);
 	hash.resize(key_.size());
 	setKey(hash);
 #endif
@@ -147,7 +148,7 @@ PIByteArray PICrypt::hash(const PIString & secret) {
 	if (!init()) return hash;
 	hash.resize(crypto_generichash_BYTES);
 	PIByteArray s(secret.data(), secret.size());
-	crypto_generichash(hash.data(), hash.size(), s.data(), s.size(), (const uchar*)hash_def_key, sizeof(hash_def_key) - 1);
+	crypto_generichash(hash.data(), hash.size(), s.data(), s.size(),(const uchar*)hash_def_key, hash_def_key_size);
 #else
 	PICRYPT_DISABLED_WARNING
 #endif
@@ -160,7 +161,7 @@ PIByteArray PICrypt::hash(const PIByteArray & data) {
 #ifdef PIP_CRYPT
 	if (!init()) return hash;
 	hash.resize(crypto_generichash_BYTES);
-	crypto_generichash(hash.data(), hash.size(), data.data(), data.size(), (const uchar*)hash_def_key, sizeof(hash_def_key) - 1);
+	crypto_generichash(hash.data(), hash.size(), data.data(), data.size(), (const uchar*)hash_def_key, hash_def_key_size);
 #else
 	PICRYPT_DISABLED_WARNING
 #endif