diff --git a/src/machine/machine_rp2_2040.go b/src/machine/machine_rp2_2040.go
index 0691b8d77..e7ae38c06 100644
--- a/src/machine/machine_rp2_2040.go
+++ b/src/machine/machine_rp2_2040.go
@@ -9,6 +9,7 @@ import (
 )
 
 const (
+	cpuFreq          = 125 * MHz
 	_NUMBANK0_GPIOS  = 30
 	_NUMBANK0_IRQS   = 4
 	_NUMIRQ          = 32
diff --git a/src/machine/machine_rp2_2350.go b/src/machine/machine_rp2_2350.go
index 5ef5098c6..d20bb2d78 100644
--- a/src/machine/machine_rp2_2350.go
+++ b/src/machine/machine_rp2_2350.go
@@ -9,6 +9,7 @@ import (
 )
 
 const (
+	cpuFreq          = 150 * MHz
 	_NUMBANK0_GPIOS  = 48
 	_NUMBANK0_IRQS   = 6
 	rp2350ExtraReg   = 1
diff --git a/src/machine/machine_rp2_clocks.go b/src/machine/machine_rp2_clocks.go
index 520a8d333..d6059896e 100644
--- a/src/machine/machine_rp2_clocks.go
+++ b/src/machine/machine_rp2_clocks.go
@@ -10,7 +10,7 @@ import (
 )
 
 func CPUFrequency() uint32 {
-	return 125 * MHz
+	return cpuFreq
 }
 
 // clockIndex identifies a hardware clock