diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 42bbf38..6babe0b 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -292,5 +292,6 @@
 /* global variables */
 extern plat_psci_ops_t plat_arm_psci_pm_ops;
 extern const mmap_region_t plat_arm_mmap[];
+extern const unsigned int arm_pm_idle_states[];
 
 #endif /* __PLAT_ARM_H__ */