diff --git a/src/cpu/intel/slot_1/Kconfig b/src/cpu/intel/slot_1/Kconfig
index 3d0522a09d..10001bdc5f 100644
--- a/src/cpu/intel/slot_1/Kconfig
+++ b/src/cpu/intel/slot_1/Kconfig
@@ -24,7 +24,8 @@ config SLOT_SPECIFIC_OPTIONS # dummy
 	select CPU_INTEL_MODEL_6BX
 	select CPU_INTEL_MODEL_6XX
 	select NO_SMM
-	select NO_MONOTONIC_TIMER
+	select UDELAY_TSC
+	select TSC_MONOTONIC_TIMER
 	select UNKNOWN_TSC_RATE
 
 config DCACHE_RAM_BASE
diff --git a/src/northbridge/intel/i440bx/Kconfig b/src/northbridge/intel/i440bx/Kconfig
index 45cdd9c7f1..df1e3650a4 100644
--- a/src/northbridge/intel/i440bx/Kconfig
+++ b/src/northbridge/intel/i440bx/Kconfig
@@ -17,7 +17,6 @@ config NORTHBRIDGE_INTEL_I440BX
 	bool
 	select NO_MMCONF_SUPPORT
 	select HAVE_DEBUG_RAM_SETUP
-	select UDELAY_IO
 
 config SDRAMPWR_4DIMM
 	bool