diff --git a/Source/ARTTokenParams.m b/Source/ARTTokenParams.m
index de4e73019..4f59bb772 100644
--- a/Source/ARTTokenParams.m
+++ b/Source/ARTTokenParams.m
@@ -153,8 +153,9 @@ - (ARTTokenRequest *)sign:(NSString *)key withNonce:(NSString *)nonce {
     NSString *keyName = keyComponents[0];
     NSString *keySecret = keyComponents[1];
     NSString *clientId = self.clientId ? self.clientId : @"";
+    NSTimeInterval ttl = self.ttl ? self.ttl : [ARTDefault ttl];
     
-    NSString *signText = [NSString stringWithFormat:@"%@\n%lld\n%@\n%@\n%lld\n%@\n", keyName, timeIntervalToMilliseconds(self.ttl), self.capability, clientId, dateToMilliseconds(self.timestamp), nonce];
+    NSString *signText = [NSString stringWithFormat:@"%@\n%lld\n%@\n%@\n%lld\n%@\n", keyName, timeIntervalToMilliseconds(ttl), self.capability, clientId, dateToMilliseconds(self.timestamp), nonce];
     NSString *mac = hmacForDataAndKey([signText dataUsingEncoding:NSUTF8StringEncoding], [keySecret dataUsingEncoding:NSUTF8StringEncoding]);
     
     return [[ARTTokenRequest alloc] initWithTokenParams:self keyName:keyName nonce:nonce mac:mac];
diff --git a/Source/ARTTokenRequest.m b/Source/ARTTokenRequest.m
index 999170ce5..e82f45374 100644
--- a/Source/ARTTokenRequest.m
+++ b/Source/ARTTokenRequest.m
@@ -9,12 +9,13 @@
 #import "ARTTokenRequest.h"
 #import "ARTTokenParams.h"
 #import "ARTAuth+Private.h"
+#import "ARTDefault.h"
 
 @implementation ARTTokenRequest
 
 - (instancetype)initWithTokenParams:(ARTTokenParams *)tokenParams keyName:(NSString *)keyName nonce:(NSString *)nonce mac:(NSString *)mac {
     if (self = [super init]) {
-        self.ttl = tokenParams.ttl;
+        self.ttl = tokenParams.ttl ? tokenParams.ttl : [ARTDefault ttl];
         self.capability = tokenParams.capability;
         self.clientId = tokenParams.clientId;
         self.timestamp = tokenParams.timestamp;