diff --git a/src/drivers/hardware_specific/esp32_mcu.cpp b/src/drivers/hardware_specific/esp32_mcu.cpp
index 7350316d..cb839704 100644
--- a/src/drivers/hardware_specific/esp32_mcu.cpp
+++ b/src/drivers/hardware_specific/esp32_mcu.cpp
@@ -155,9 +155,12 @@ void _configureTimerFrequency(long pwm_frequency, mcpwm_dev_t* mcpwm_num,  mcpwm
   mcpwm_start(mcpwm_unit, MCPWM_TIMER_2);
   _delay(1); 
 
-  mcpwm_sync_enable(mcpwm_unit, MCPWM_TIMER_0, MCPWM_SELECT_SYNC_INT0, 0);
-  mcpwm_sync_enable(mcpwm_unit, MCPWM_TIMER_1, MCPWM_SELECT_SYNC_INT0, 0);
-  mcpwm_sync_enable(mcpwm_unit, MCPWM_TIMER_2, MCPWM_SELECT_SYNC_INT0, 0);
+  // Cast here because MCPWM_SELECT_SYNC_INT0 (1) is not defined
+  // in the default Espressif MCPWM headers. The correct const may be used
+  // when https://github.com/espressif/esp-idf/issues/5429 is resolved.
+  mcpwm_sync_enable(mcpwm_unit, MCPWM_TIMER_0, (mcpwm_sync_signal_t)1, 0);
+  mcpwm_sync_enable(mcpwm_unit, MCPWM_TIMER_1, (mcpwm_sync_signal_t)1, 0);
+  mcpwm_sync_enable(mcpwm_unit, MCPWM_TIMER_2, (mcpwm_sync_signal_t)1, 0);
   _delay(1);
   mcpwm_num->timer[0].sync.out_sel = 1;
   _delay(1);
@@ -428,4 +431,4 @@ void _writeDutyCycle6PWM(float dc_a,  float dc_b, float dc_c, float dead_zone, i
     }
   }
 }
-#endif
\ No newline at end of file
+#endif