diff --git a/src/timer.c b/src/timer.c
index 0bec1bd..971b392 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -10,8 +10,8 @@ void tim4_init(void) {
   TIM4->CR2 = 0x0000;
 
   // Set prescaler
-  // f_clk = 48MHz -> /48000 = 1KHz counting frequency = 1ms
-  TIM4->PSC = (uint16_t) 48000 - 1;
+  // f_clk = 96MHz -> 96E6/96E3 = 1E3 = 1KHz counting frequency = 1ms
+  TIM4->PSC = (uint16_t) 96000 - 1;
 
   // Set ARR to maximum value to get 1ms between updates
   TIM4->ARR = (uint16_t) 0xFFFF;