diff --git a/examples/objc/AppRTCMobile/ARDSignalingMessage.m b/examples/objc/AppRTCMobile/ARDSignalingMessage.m
index 57af826935..e1e897921d 100644
--- a/examples/objc/AppRTCMobile/ARDSignalingMessage.m
+++ b/examples/objc/AppRTCMobile/ARDSignalingMessage.m
@@ -125,6 +125,7 @@ static NSString * const kARDTypeValueRemoveCandidates = @"remove-candidates";
       messageType = kARDSignalingMessageTypeAnswer;
       break;
     case RTCSdpTypePrAnswer:
+    case RTCSdpTypeRollback:
       NSAssert(
           NO, @"Unexpected type: %@", [RTC_OBJC_TYPE(RTCSessionDescription) stringForType:sdpType]);
       break;
diff --git a/sdk/objc/api/peerconnection/RTCSessionDescription.h b/sdk/objc/api/peerconnection/RTCSessionDescription.h
index 6bd118db13..8a9479d5cf 100644
--- a/sdk/objc/api/peerconnection/RTCSessionDescription.h
+++ b/sdk/objc/api/peerconnection/RTCSessionDescription.h
@@ -20,6 +20,7 @@ typedef NS_ENUM(NSInteger, RTCSdpType) {
   RTCSdpTypeOffer,
   RTCSdpTypePrAnswer,
   RTCSdpTypeAnswer,
+  RTCSdpTypeRollback,
 };
 
 NS_ASSUME_NONNULL_BEGIN
diff --git a/sdk/objc/api/peerconnection/RTCSessionDescription.mm b/sdk/objc/api/peerconnection/RTCSessionDescription.mm
index a62870e088..15865dd1ec 100644
--- a/sdk/objc/api/peerconnection/RTCSessionDescription.mm
+++ b/sdk/objc/api/peerconnection/RTCSessionDescription.mm
@@ -83,6 +83,8 @@
       return webrtc::SessionDescriptionInterface::kPrAnswer;
     case RTCSdpTypeAnswer:
       return webrtc::SessionDescriptionInterface::kAnswer;
+    case RTCSdpTypeRollback:
+      return webrtc::SessionDescriptionInterface::kRollback;
   }
 }
 
@@ -93,6 +95,8 @@
     return RTCSdpTypePrAnswer;
   } else if (string == webrtc::SessionDescriptionInterface::kAnswer) {
     return RTCSdpTypeAnswer;
+  } else if (string == webrtc::SessionDescriptionInterface::kRollback) {
+    return RTCSdpTypeRollback;
   } else {
     RTC_NOTREACHED();
     return RTCSdpTypeOffer;