diff --git a/firmware/lib/hal.c b/firmware/lib/hal.c
index fc04d6a..af88d5a 100644
--- a/firmware/lib/hal.c
+++ b/firmware/lib/hal.c
@@ -214,7 +214,7 @@ void buzzer_off(void) {
 
 void wait_ms(uint16_t ms) {
 	// TODO: this function seems to be ~10% too fast
-	int32_t cycles = ms * (int32_t)64;
+	int32_t cycles = ms * (int32_t) 76;
 
 	// wait_time is int16_t for performance reasons, so we have to wait multiple times
 
diff --git a/firmware/lib/rc5.c b/firmware/lib/rc5.c
index 6bcdcbd..9886f6f 100644
--- a/firmware/lib/rc5.c
+++ b/firmware/lib/rc5.c
@@ -2,7 +2,7 @@
 
 #include <pentabug/hal.h>
 
-#define HALF_BIT_TICKS		34
+#define HALF_BIT_TICKS		68
 
 static uint8_t toggle = 0;