diff --git a/docs/SourceBasedCodeCoverage.rst b/docs/SourceBasedCodeCoverage.rst
index b56675da734fa435666c2bd84ae82f33e628ffe2..8c4ab8d0ae41bc81c73e5c97eaac81f16fbfb238 100644
--- a/docs/SourceBasedCodeCoverage.rst
+++ b/docs/SourceBasedCodeCoverage.rst
@@ -115,7 +115,7 @@ To generate the same report in html with demangling turned on, use:
 
 .. code-block:: console
 
-    % llvm-cov show ./foo -instr-profile=foo.profdata -format html -Xdemangler c++filt -Xdemangler -n
+    % llvm-cov show ./foo -instr-profile=foo.profdata -format html -o report.dir -Xdemangler c++filt -Xdemangler -n
 
 This report includes a summary view as well as dedicated sub-views for
 templated functions and their instantiations. For our example program, we get