diff --git a/drv/rcc.c b/drv/rcc.c
index 4369a79..4c97f5c 100644
--- a/drv/rcc.c
+++ b/drv/rcc.c
@@ -94,17 +94,20 @@ void rcc_reset(enum RccApb1 apb1_mask, enum RccApb2 apb2_mask)
 
 void rcc_get_clocks(struct RccClocks* clocks)
 {
+	clocks->ahb_freq = 0;
 	switch (current_preset)
 	{
 		case RCC_PRESET_DEFAULT:
 			clocks->ahb_freq = 8000000;
 			clocks->apb1_freq = 8000000;
 			clocks->apb2_freq = 8000000;
+			clocks->tim_freq = 8000000;
 			break;
 		case RCC_PRESET_SPEED:
 			clocks->ahb_freq = 72000000;
 			clocks->apb1_freq = 36000000;
 			clocks->apb2_freq = 72000000;
+			clocks->tim_freq = 7200000;
 			break;
 		default:
 			//TODO hardfault
diff --git a/drv/rcc.h b/drv/rcc.h
index 9d1e9d4..51eacea 100644
--- a/drv/rcc.h
+++ b/drv/rcc.h
@@ -106,6 +106,7 @@ struct RccClocks {
 	uint32_t ahb_freq;
 	uint32_t apb1_freq;
 	uint32_t apb2_freq;
+	uint32_t tim_freq;
 };