diff --git a/radio/src/targets/common/arm/stm32/rotary_encoder_driver.cpp b/radio/src/targets/common/arm/stm32/rotary_encoder_driver.cpp
index 1f25e4c5e..0bee64429 100644
--- a/radio/src/targets/common/arm/stm32/rotary_encoder_driver.cpp
+++ b/radio/src/targets/common/arm/stm32/rotary_encoder_driver.cpp
@@ -162,6 +162,14 @@ void rotaryEncoderInit()
   ROTARY_ENCODER_TIMER->CR1 = 0;
   ROTARY_ENCODER_TIMER->DIER |= TIM_DIER_UIE;
 
+#if defined(LL_APB4_GRP1_PERIPH_SYSCFG)
+  LL_APB4_GRP1_EnableClock(LL_APB4_GRP1_PERIPH_SYSCFG);
+#elif defined(LL_APB2_GRP1_PERIPH_SYSCFG)
+  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
+#else
+  #error "Unsupported SYSCFG clock"
+#endif
+
   LL_SYSCFG_SetEXTISource(ROTARY_ENCODER_EXTI_PORT, ROTARY_ENCODER_EXTI_SYS_LINE1);
   LL_SYSCFG_SetEXTISource(ROTARY_ENCODER_EXTI_PORT, ROTARY_ENCODER_EXTI_SYS_LINE2);