diff --git a/include/acpi/acpi_numa.h b/include/acpi/acpi_numa.h
index fdebcfc6c8df8a90d24ff3b013e4f90c90f847d5..09eb3bc20ff59fc9818c412d1ad6fb35f8375adf 100644
--- a/include/acpi/acpi_numa.h
+++ b/include/acpi/acpi_numa.h
@@ -22,5 +22,10 @@ extern int acpi_numa __initdata;
 extern void bad_srat(void);
 extern int srat_disabled(void);
 
+#else				/* CONFIG_ACPI_NUMA */
+static inline int pxm_to_node(int pxm)
+{
+	return 0;
+}
 #endif				/* CONFIG_ACPI_NUMA */
 #endif				/* __ACP_NUMA_H */