diff --git a/tools/misc/coverage-helper.cpp b/tools/misc/coverage-helper.cpp
index a31e927f..9e7a8ca4 100644
--- a/tools/misc/coverage-helper.cpp
+++ b/tools/misc/coverage-helper.cpp
@@ -95,7 +95,7 @@ int exec_cmd(std::string const& cmd, int log_num, std::string const& path) {
 
     // cmd has already been escaped outside this function.
     auto real_cmd = "OpenCppCoverage --export_type binary:cov-report" + std::to_string(log_num)
-        + ".bin --quiet " + "--sources " + escape_arg(path) + " --cover_children -- " + cmd;
+        + ".bin --quiet " + "--sources " + escape_arg(path) + "\\src" + " --cover_children -- " + cmd;
     std::cout << "=== Marker ===: Cmd: " << real_cmd << '\n';
     auto pipe = _popen(real_cmd.c_str(), "r");