diff --git a/benchmarks/linux-perf-events.h b/benchmarks/linux-perf-events.h
index 0a9e553..99e4ef1 100644
--- a/benchmarks/linux-perf-events.h
+++ b/benchmarks/linux-perf-events.h
@@ -10,7 +10,7 @@
 #include <cstring> // for memset
 #include <stdexcept>
 
-#include <iostream>
+#include <array>
 #include <vector>
 
 template <int TYPE = PERF_TYPE_HARDWARE> class LinuxEvents {
@@ -22,7 +22,7 @@ template <int TYPE = PERF_TYPE_HARDWARE> class LinuxEvents {
   std::vector<uint64_t> ids{};
 
 public:
-  explicit LinuxEvents(std::vector<int> config_vec) : fd(0), working(true) {
+  explicit LinuxEvents(std::array<unsigned long long, 4> config_vec) : fd(0), working(true) {
     memset(&attribs, 0, sizeof(attribs));
     attribs.type = TYPE;
     attribs.size = sizeof(attribs);