diff --git a/arch/arm/include/asm/armv7.h b/arch/arm/include/asm/armv7.h
index cd40912..58d8b16 100644
--- a/arch/arm/include/asm/armv7.h
+++ b/arch/arm/include/asm/armv7.h
@@ -140,6 +140,8 @@
 void v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl, u32 cpu_midr,
 				 u32 cpu_rev_comb, u32 cpu_variant,
 				 u32 cpu_rev);
+void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb,
+			  u32 cpu_variant, u32 cpu_rev);
 #endif /* ! __ASSEMBLY__ */
 
 #endif