diff --git a/CMakeLists.txt b/CMakeLists.txt
index e42302efe..10f4307bf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -374,6 +374,8 @@ katie_check_function(ecvt "stdlib.h")
 katie_check_function(getprogname "stdlib.h")
 # FreeBSD 5.4
 katie_check_function(pthread_attr_get_np "pthread_np.h" "${CMAKE_THREAD_LIBS_INIT}")
+# OpenBSD 2.1
+katie_check_function(arc4random "stdlib.h")
 # GNU
 katie_check_function(get_current_dir_name "unistd.h")
 katie_check_function(prctl "sys/prctl.h")
diff --git a/src/core/global/qglobal.cpp b/src/core/global/qglobal.cpp
index e01287ada..3bd5eb59e 100644
--- a/src/core/global/qglobal.cpp
+++ b/src/core/global/qglobal.cpp
@@ -1523,14 +1523,18 @@ void qsrand(uint seed)
 
     \sa qsrand()
 */
-thread_local time_t almostrandom = 0;
 int qrand()
 {
+#if defined(QT_HAVE_ARC4RANDOM)
+    return ::arc4random();
+#else
     // Seed the PRNG once per thread with a combination of current time and its address
+    thread_local time_t almostrandom = 0;
     if (!almostrandom) {
         ::time(&almostrandom);
         std::srand(almostrandom + std::intptr_t(&almostrandom));
     }
+#endif
     return std::rand();
 }