diff --git a/google/cloud/oslogin/v1/oslogin.proto b/google/cloud/oslogin/v1/oslogin.proto
index 75d7c060..25e9be0a 100644
--- a/google/cloud/oslogin/v1/oslogin.proto
+++ b/google/cloud/oslogin/v1/oslogin.proto
@@ -31,6 +31,7 @@ option java_multiple_files = true;
 option java_outer_classname = "OsLoginProto";
 option java_package = "com.google.cloud.oslogin.v1";
 option php_namespace = "Google\\Cloud\\OsLogin\\V1";
+option ruby_package = "Google::Cloud::OsLogin::V1";
 
 // Cloud OS Login API
 //
diff --git a/google/cloud/oslogin/v1beta/oslogin.proto b/google/cloud/oslogin/v1beta/oslogin.proto
index f42c713d..a5d78474 100644
--- a/google/cloud/oslogin/v1beta/oslogin.proto
+++ b/google/cloud/oslogin/v1beta/oslogin.proto
@@ -31,6 +31,7 @@ option java_multiple_files = true;
 option java_outer_classname = "OsLoginProto";
 option java_package = "com.google.cloud.oslogin.v1beta";
 option php_namespace = "Google\\Cloud\\OsLogin\\V1beta";
+option ruby_package = "Google::Cloud::OsLogin::V1beta";
 
 // Cloud OS Login API
 //