diff --git a/Telegram/SourceFiles/pspecific_mac.cpp b/Telegram/SourceFiles/pspecific_mac.cpp
index b3abc35af8..7b3a9d5e5b 100644
--- a/Telegram/SourceFiles/pspecific_mac.cpp
+++ b/Telegram/SourceFiles/pspecific_mac.cpp
@@ -741,7 +741,7 @@ void PsUpdateDownloader::unpackUpdate() {
 		return fatalFail();
 	}
 
-	RSA *pbKey = PEM_read_bio_RSAPublicKey(BIO_new_mem_buf(const_cast<char*>(UpdatesPublicKey), -1), 0, 0, 0);
+	RSA *pbKey = PEM_read_bio_RSAPublicKey(BIO_new_mem_buf(const_cast<char*>(DevChannel ? UpdatesPublicDevKey : UpdatesPublicKey), -1), 0, 0, 0);
 	if (!pbKey) {
 		LOG(("Update Error: cant read public rsa key!"));
 		return fatalFail();