1 files changed, 1 insertions, 1 deletions
diff --git a/src/mongo/client/sdam/server_description.cpp b/src/mongo/client/sdam/server_description.cpp
index a3e8b7f0899..babe5d1a777 100644
--- a/src/mongo/client/sdam/server_description.cpp
+++ b/src/mongo/client/sdam/server_description.cpp
@@ -209,7 +209,7 @@ void ServerDescription::parseTypeFromHelloReply(const BSONObj helloReply) {
         t = ServerType::kMongos;
     } else if (hasSetName && helloReply.getBoolField("hidden")) {
         t = ServerType::kRSOther;
-    } else if (hasSetName && helloReply.getBoolField("isWritablePrimary")) {
+    } else if (hasSetName && helloReply.getBoolField("ismaster")) {
         t = ServerType::kRSPrimary;
     } else if (hasSetName && helloReply.getBoolField("secondary")) {
         t = ServerType::kRSSecondary;