diff --git a/test/kvec_test.cc b/test/kvec_test.cc
index 1015574..13490a2 100644
--- a/test/kvec_test.cc
+++ b/test/kvec_test.cc
@@ -53,8 +53,7 @@ int main()
 	t = clock();
 	for (i = 0; i < M; ++i) {
 		std::vector<int> array;
-		array.reserve(N);
-		for (j = 0; j < N; ++j) array[j] = j;
+		for (j = 0; j < N; ++j) array.push_back(j);
 	}
 	printf("C++ vector, preallocated: %.3f sec\n",
 		   (float)(clock() - t) / CLOCKS_PER_SEC);