diff --git a/types/azure-sb/index.d.ts b/types/azure-sb/index.d.ts
index 9f9d07d3dc..bd62e100ab 100644
--- a/types/azure-sb/index.d.ts
+++ b/types/azure-sb/index.d.ts
@@ -75,7 +75,7 @@ export namespace Azure.ServiceBus {
         DefaultMessageTimeToLive: string;
         DuplicateDetectionHistoryTimeWindow: string;
         EnablePartitioning: boolean;
-        MaxSizeInMegaBytes: number;
+        MaxSizeInMegabytes: number;
         RequiresDuplicateDetection: boolean;
     }