diff --git a/include/chat/crypto.h b/include/chat/crypto.h
index 32fe08a..4be3d4e 100644
--- a/include/chat/crypto.h
+++ b/include/chat/crypto.h
@@ -28,6 +28,7 @@ extern "C" {
 //MACROS
 #define WHY2_CHAT_KEY_BITS 4096 //BITS..
 #define WHY2_CHAT_PRIME_ITERS 100 //NUMBER OF ITERATIONS WHEN CHECKING PRIME NUMBER
+#define WHY2_CHAT_RSA_EXPONENT 65537 //DEFAULT e
 
 #define WHY2_CHAT_PUB_KEY_LOCATION WHY2_CHAT_CONFIG_DIR "/keys" //KEYS LOCATION