diff --git a/include/asm-i386/mmzone.h b/include/asm-i386/mmzone.h
index 5164213..348fe3a 100644
--- a/include/asm-i386/mmzone.h
+++ b/include/asm-i386/mmzone.h
@@ -29,7 +29,7 @@
 #ifdef CONFIG_X86_NUMAQ
 	if (get_memcfg_numaq())
 		return;
-#elif CONFIG_ACPI_SRAT
+#elif defined(CONFIG_ACPI_SRAT)
 	if (get_memcfg_from_srat())
 		return;
 #endif