diff --git a/cli/cmdlineparser.cpp b/cli/cmdlineparser.cpp
index 78ca6bc9e..e554b0d3d 100644
--- a/cli/cmdlineparser.cpp
+++ b/cli/cmdlineparser.cpp
@@ -834,7 +834,7 @@ void CmdLineParser::PrintHelp() const
               "  cppcheck --quiet ../myproject/\n"
               "\n"
               "  # Check test.cpp, enable all checks:\n"
-              "  cppcheck --enable=all --inconclusive test.cpp\n"
+              "  cppcheck --enable=all --inconclusive --std=posix test.cpp\n"
               "\n"
               "  # Check f.cpp and search include files from inc1/ and inc2/:\n"
               "  cppcheck -I inc1/ -I inc2/ f.cpp\n"