diff --git a/google/cloud/securitycentermanagement/v1/security_center_management.proto b/google/cloud/securitycentermanagement/v1/security_center_management.proto
index 2f401c2b78..b4fbd9c29a 100644
--- a/google/cloud/securitycentermanagement/v1/security_center_management.proto
+++ b/google/cloud/securitycentermanagement/v1/security_center_management.proto
@@ -469,7 +469,7 @@ message ListEffectiveSecurityHealthAnalyticsCustomModulesRequest {
   // Default is 10, minimum is 1, maximum is 1000.
   int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
 
-  // Optional. The value returned by the last call indicating a continuation
+  // Optional. The value returned by the last call indicating a continuation.
   string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
 }