diff --git a/src/corelib/io/qtemporaryfile_p.h b/src/corelib/io/qtemporaryfile_p.h
index 0fec88d3cd4..6bcff936b4a 100644
--- a/src/corelib/io/qtemporaryfile_p.h
+++ b/src/corelib/io/qtemporaryfile_p.h
@@ -145,10 +145,10 @@ public:
     bool isUnnamedFile() const override final;
 
     const QString &templateName;
-    quint32 fileMode;
+    quint32 fileMode = 0;
     int flags = 0;
-    bool filePathIsTemplate;
-    bool filePathWasTemplate;
+    bool filePathIsTemplate = true;
+    bool filePathWasTemplate = true;
     bool unnamedFile = false;
 };