diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index a95c49b..cca612d 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -65,6 +65,7 @@
 
 # Power Management
 obj-$(CONFIG_PM)		+= pm.o
+obj-$(CONFIG_AT91_SLOW_CLOCK)	+= pm_slowclock.o
 
 ifeq ($(CONFIG_PM_DEBUG),y)
 CFLAGS_pm.o += -DDEBUG