diff --git a/java/ql/lib/semmle/code/java/dataflow/ExternalFlow.qll b/java/ql/lib/semmle/code/java/dataflow/ExternalFlow.qll
index 050787aa713..1536c81aa08 100644
--- a/java/ql/lib/semmle/code/java/dataflow/ExternalFlow.qll
+++ b/java/ql/lib/semmle/code/java/dataflow/ExternalFlow.qll
@@ -367,7 +367,7 @@ module ModelValidation {
     )
   }
 
-  string getIncorrectConstructorSummaryOutput() {
+  private string getIncorrectConstructorSummaryOutput() {
     exists(string namespace, string type, string name, string output |
       summaryModel(namespace, type, _, name, _, _, _, output, _, _, _)
     |