1 files changed, 1 insertions, 1 deletions
diff --git a/shell/qa/zip/testzipimpl.hxx b/shell/qa/zip/testzipimpl.hxx
index 5f85baafcfdf..6a2afc0cfe27 100644
--- a/shell/qa/zip/testzipimpl.hxx
+++ b/shell/qa/zip/testzipimpl.hxx
@@ -34,7 +34,7 @@ class TestZipImpl
     ZipFile zipFile;
     vector<string> expectedContents;
  public:
-    TestZipImpl(StreamInterface *stream);
+    explicit TestZipImpl(StreamInterface *stream);
     ~TestZipImpl();
     bool test_directory();
     bool test_hasContentCaseInSensitive();