diff --git a/include/asm-x86/genapic_64.h b/include/asm-x86/genapic_64.h
index 1de931b263ce142f7b30ae70af6c033cbd3f25d5..0f8504627c41ce8c6d9f168e8ff038a8d15c3d12 100644
--- a/include/asm-x86/genapic_64.h
+++ b/include/asm-x86/genapic_64.h
@@ -44,4 +44,6 @@ DECLARE_PER_CPU(int, x2apic_extra_bits);
 extern void uv_cpu_init(void);
 extern int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip);
 
+extern void setup_apic_routing(void);
+
 #endif