Index: src/OFThread.h
==================================================================
--- src/OFThread.h
+++ src/OFThread.h
@@ -112,13 +112,24 @@
  * \return The current thread or nil if we are in the main thread
  */
 + (OFThread*)currentThread;
 
 /**
- * Suspends execution of the current thread for N milliseconds.
+ * Suspends execution of the current thread for the specified time interval.
+ *
+ * \param sec The number of seconds to sleep
+ */
++ (void)sleepForTimeInterval: (int64_t)sec;
+
+/**
+ * Suspends execution of the current thread for the specified time interval.
+ *
+ * \param sec The number of seconds to sleep
+ * \param usec The number of microseconds to sleep
  */
-+ (void)sleepForNMilliseconds: (unsigned int)msecs;
++ (void)sleepForTimeInterval: (int64_t)sec
+		microseconds: (uint32_t)usec;
 
 /**
  * Suspends execution of the current thread until the specified date.
  */
 + (void)sleepUntilDate: (OFDate*)date;

Index: src/OFThread.m
==================================================================
--- src/OFThread.m
+++ src/OFThread.m
@@ -94,17 +94,33 @@
 + (OFThread*)currentThread
 {
 	return of_tlskey_get(thread_self);
 }
 
-+ (void)sleepForNMilliseconds: (unsigned int)msecs;
++ (void)sleepForTimeInterval: (int64_t)sec
+{
+	if (sec < 0)
+		@throw [OFOutOfRangeException newWithClass: self];
+
+#ifndef _WIN32
+	sleep(sec);
+#else
+	Sleep(sec * 1000);
+#endif
+}
+
++ (void)sleepForTimeInterval: (int64_t)sec
+		microseconds: (uint32_t)usec
 {
+	if (sec < 0)
+		@throw [OFOutOfRangeException newWithClass: self];
+
 #ifndef _WIN32
-	sleep(msecs / 1000);
-	usleep((msecs % 1000) * 1000);
+	sleep(sec);
+	usleep(usec);
 #else
-	Sleep(msecs);
+	Sleep(sec * 1000 + usec / 1000);
 #endif
 }
 
 + (void)sleepUntilDate: (OFDate*)date
 {