diff --git a/32blit-pico/display_picovision.cpp b/32blit-pico/display_picovision.cpp
index c3897d7f3..50dea29cc 100644
--- a/32blit-pico/display_picovision.cpp
+++ b/32blit-pico/display_picovision.cpp
@@ -1,5 +1,7 @@
 #include "display.hpp"
 
+#include "pico/stdlib.h"
+
 #include "config.h"
 
 #include "dv_display.hpp"
@@ -16,6 +18,11 @@ static void vsync_callback(uint gpio, uint32_t events){
 }
 
 void init_display() {
+// bit of a hack overriding clock here, but 250 does not work
+#if OVERCLOCK_250
+  set_sys_clock_khz(216000, true);
+#endif
+
   display.init(DISPLAY_WIDTH, DISPLAY_HEIGHT, pimoroni::DVDisplay::MODE_RGB555);
 
   gpio_set_irq_enabled_with_callback(16/*VSYNC*/, GPIO_IRQ_EDGE_RISE, true, vsync_callback);
diff --git a/32blit-pico/main.cpp b/32blit-pico/main.cpp
index 6b9122dd1..fce4790e1 100644
--- a/32blit-pico/main.cpp
+++ b/32blit-pico/main.cpp
@@ -124,7 +124,7 @@ int main() {
   // this is required for a stable 250MHz on some RP2040s
   vreg_set_voltage(VREG_VOLTAGE_1_20);
   sleep_ms(10);
-  set_sys_clock_khz(250000, false);
+  set_sys_clock_khz(250000, true);
 #endif
 
   stdio_init_all();