diff --git a/src/benchmark.cc b/src/benchmark.cc
index 07942eba..b751b9c3 100644
--- a/src/benchmark.cc
+++ b/src/benchmark.cc
@@ -435,7 +435,7 @@ void ParseCommandLineFlags(int* argc, char** argv) {
   using namespace benchmark;
   BenchmarkReporter::Context::executable_name =
       (argc && *argc > 0) ? argv[0] : "unknown";
-  for (int i = 1; i < *argc; ++i) {
+  for (int i = 1; argc && i < *argc; ++i) {
     if (ParseBoolFlag(argv[i], "benchmark_list_tests",
                       &FLAGS_benchmark_list_tests) ||
         ParseStringFlag(argv[i], "benchmark_filter", &FLAGS_benchmark_filter) ||