diff --git a/src/cpu/intel/car/p4-netburst/cache_as_ram.S b/src/cpu/intel/car/p4-netburst/cache_as_ram.S
index 9d50582..4beac0b 100644
--- a/src/cpu/intel/car/p4-netburst/cache_as_ram.S
+++ b/src/cpu/intel/car/p4-netburst/cache_as_ram.S
@@ -23,7 +23,7 @@
 
 /* Macro to access Local APIC registers at default base. */
 #define LAPIC(x)		$(LAPIC_DEFAULT_BASE | LAPIC_ ## x)
-#if !IS_ENABLED(CONFIG_C_ENVIRONMENT_BOOTBLOCK)
+#if !CONFIG(C_ENVIRONMENT_BOOTBLOCK)
 /* Fixed location, ASSERTED in failover.ld if it changes. */
 .set ap_sipi_vector_in_rom, 0xff
 #endif
@@ -318,7 +318,7 @@
 	invd
 	movl	%eax, %cr0
 
-#if IS_ENABLED(CONFIG_MICROCODE_UPDATE_PRE_RAM)
+#if CONFIG(MICROCODE_UPDATE_PRE_RAM)
 	update_microcode:
 	/* put the return address in %esp */
 	movl	$end_microcode_update, %esp