diff --git a/configs/qemu-i486/include/board.h b/configs/qemu-i486/include/board.h
index 35f98987c3b..31ae72dc4dd 100755
--- a/configs/qemu-i486/include/board.h
+++ b/configs/qemu-i486/include/board.h
@@ -49,6 +49,10 @@
 
 /* Clocking *************************************************************************/
 
+/* Programmable interval timer (PIT) */
+
+#define PIT_CLOCK 1041816 /* PIT input clock */
+
 /* LED definitions ******************************************************************/
 
 /* Button definitions ***************************************************************/