diff --git a/c/src/lib/libbsp/powerpc/psim/ChangeLog b/c/src/lib/libbsp/powerpc/psim/ChangeLog
index 0c2ccc141a..a9d729e93e 100644
--- a/c/src/lib/libbsp/powerpc/psim/ChangeLog
+++ b/c/src/lib/libbsp/powerpc/psim/ChangeLog
@@ -1,3 +1,7 @@
+2008-07-16	Joel Sherrill <joel.sherrill@oarcorp.com>
+
+	* configure.ac: Add fast idle.
+
 2008-05-15	Joel Sherrill <joel.sherrill@OARcorp.com>
 
 	* Makefile.am, configure.ac, startup/bspstart.c: Add capability for
diff --git a/c/src/lib/libbsp/powerpc/psim/configure.ac b/c/src/lib/libbsp/powerpc/psim/configure.ac
index 2398aeb12e..a0f26228ef 100644
--- a/c/src/lib/libbsp/powerpc/psim/configure.ac
+++ b/c/src/lib/libbsp/powerpc/psim/configure.ac
@@ -29,6 +29,12 @@ RTEMS_BSPOPTS_HELP([PPC_VECTOR_FILE_BASE],
 [This defines the base address of the exception table.
  NOTE: Vectors are actually at 0xFFF00000 but file starts at offset.])
 
+RTEMS_BSPOPTS_SET([CLOCK_DRIVER_USE_FAST_IDLE],[psim],[1])
+RTEMS_BSPOPTS_HELP([CLOCK_DRIVER_USE_FAST_IDLE],
+[This sets a mode where the time runs as fast as possible when
+ a clock ISR occurs while the IDLE thread is executing.  This can
+ significantly reduce simulation times.])
+
 RTEMS_BSP_BOOTCARD_HANDLES_RAM_ALLOCATION
 
 # Explicitly list all Makefiles here