diff --git a/clang/tools/scan-build/libexec/ccc-analyzer b/clang/tools/scan-build/libexec/ccc-analyzer
--- a/clang/tools/scan-build/libexec/ccc-analyzer
+++ b/clang/tools/scan-build/libexec/ccc-analyzer
@@ -752,7 +752,7 @@
                                DIR => $HtmlDir);
         $ResultFile = $f;
         # If the HtmlDir is not set, we should clean up the plist files.
-        if (!defined $HtmlDir || -z $HtmlDir) {
+        if (!defined $HtmlDir || $HtmlDir eq "") {
           $CleanupFile = $f;
         }
       }