diff --git a/src/modules/clock.cpp b/src/modules/clock.cpp
index bb4da21..69fdebb 100644
--- a/src/modules/clock.cpp
+++ b/src/modules/clock.cpp
@@ -75,9 +75,10 @@ waybar::modules::Clock::Clock(const std::string& id, const Json::Value& config)
   thread_ = [this] {
     dp.emit();
     auto now = std::chrono::system_clock::now();
-    auto timeout = std::chrono::floor<std::chrono::seconds>(now + interval_);
-    auto diff = std::chrono::seconds(timeout.time_since_epoch().count() % interval_.count());
-    thread_.sleep_until(timeout - diff);
+    /* difference with projected wakeup time */
+    auto diff = now.time_since_epoch() % interval_;
+    /* sleep until the next projected time */
+    thread_.sleep_for(interval_ - diff);
   };
 }
 
diff --git a/src/modules/simpleclock.cpp b/src/modules/simpleclock.cpp
index f4a4ec4..27c7ac7 100644
--- a/src/modules/simpleclock.cpp
+++ b/src/modules/simpleclock.cpp
@@ -7,9 +7,10 @@ waybar::modules::Clock::Clock(const std::string& id, const Json::Value& config)
   thread_ = [this] {
     dp.emit();
     auto now = std::chrono::system_clock::now();
-    auto timeout = std::chrono::floor<std::chrono::seconds>(now + interval_);
-    auto diff = std::chrono::seconds(timeout.time_since_epoch().count() % interval_.count());
-    thread_.sleep_until(timeout - diff);
+    /* difference with projected wakeup time */
+    auto diff = now.time_since_epoch() % interval_;
+    /* sleep until the next projected time */
+    thread_.sleep_for(interval_ - diff);
   };
 }