diff --git a/src/timer.cpp b/src/timer.cpp
index 9fcbf83..612a6be 100644
--- a/src/timer.cpp
+++ b/src/timer.cpp
@@ -1,16 +1,13 @@
-#include <bits/types/struct_itimerspec.h>
 #include <cmath>
 #include <signal.h>
 #include <time.h>
 #include <libscerror.hpp>
 #include "timer.hpp"
 
-using namespace sc;
+uint64_t sc::timer::next_id = 0;
+std::mutex sc::timer::mutex;
 
-uint64_t timer::next_id = 0;
-std::mutex timer::mutex;
-
-timer::timer(void(*callback)(union sigval), double time, bool repeat)
+sc::timer::timer(void(*callback)(union sigval), double time, bool repeat)
     : _id {}, _time {time}, _repeat {repeat}
 {
     {
@@ -39,21 +36,21 @@ timer::timer(void(*callback)(union sigval), double time, bool repeat)
     throw_if_min1_msg(timer_settime(_tid, 0, &its, nullptr), "could not set timer");
 }
 
-timer::~timer() {
-    throw_if_min1_msg(timer_delete(_tid), "could not delete timer");
+sc::timer::~timer() {
+    timer_delete(_tid);
 }
 
-void timer::time(struct itimerspec& cur_value) const {
+void sc::timer::time(struct itimerspec& cur_value) const {
     throw_if_min1_msg(timer_gettime(_tid, &cur_value), "could not get time");
 }
 
-double timer::time() const {
+double sc::timer::time() const {
     struct itimerspec its;
     time(its);
     return its.it_value.tv_sec + its.it_value.tv_nsec * 1000000000;
 }
 
-bool timer::is_armed() const {
+bool sc::timer::is_armed() const {
     struct itimerspec its;
     time(its);
     return its.it_value.tv_sec != 0 || its.it_value.tv_nsec != 0;