diff --git a/arch/x86_64/include/arch.h b/arch/x86_64/include/arch.h
index 09a8ac7da14..45ad2229601 100644
--- a/arch/x86_64/include/arch.h
+++ b/arch/x86_64/include/arch.h
@@ -41,6 +41,8 @@
 
 /* Include architecture-specific definitions */
 
+#include <arch/barriers.h>
+
 #ifdef CONFIG_ARCH_INTEL64
 #  include <arch/intel64/arch.h>
 #endif
diff --git a/arch/x86_64/include/barriers.h b/arch/x86_64/include/barriers.h
index bf1248b9aa6..ec634564fc3 100644
--- a/arch/x86_64/include/barriers.h
+++ b/arch/x86_64/include/barriers.h
@@ -29,5 +29,6 @@
 #define UP_DMB() __asm__ __volatile__ ("mfence" ::: "memory")
 #define UP_RMB() __asm__ __volatile__ ("lfence" ::: "memory")
 #define UP_WMB() __asm__ __volatile__ ("sfence" ::: "memory")
+#define UP_WFE() __asm__ __volatile__ ("pause")
 
 #endif /* __ARCH_X86_64_INCLUDE_BARRIERS_H */