1 files changed, 4 insertions, 0 deletions
diff --git a/FL/glut.H b/FL/glut.H
index 4fe9b4f50..12efc19a5 100644
--- a/FL/glut.H
+++ b/FL/glut.H
@@ -233,7 +233,11 @@ FL_EXPORT void glutIdleFunc(void (*f)());
 
 // Warning: this cast may not work on all machines:
 inline void glutTimerFunc(unsigned int msec, void (*f)(int), int value) {
+#if defined(__LP64__)
+  Fl::add_timeout(msec*.001, (void (*)(void *))f, (void *) (long long) value);
+#else
   Fl::add_timeout(msec*.001, (void (*)(void *))f, (void *)value);
+#endif
 }
 
 inline void glutMenuStateFunc(void (*f)(int state)) {