diff --git a/sw/airborne/boards/lisa_m_1.0.h b/sw/airborne/boards/lisa_m_1.0.h
index 0d5ab7f2f3..44c0edd0d8 100644
--- a/sw/airborne/boards/lisa_m_1.0.h
+++ b/sw/airborne/boards/lisa_m_1.0.h
@@ -125,13 +125,6 @@
 
 #define BOARD_HAS_BARO 1
 
-#define USE_OPENCM3 1
-
-// not needed with USE_OPENCM3:
-//#define HSE_TYPE_EXT_CLK
-//#define STM32_RCC_MODE RCC_HSE_ON
-//#define STM32_PLL_MULT RCC_PLLMul_6
-
 // Remap the servos 5 and 6 to TIM5 CH1 and CH2
 #if !defined REMAP_SERVOS_5AND6
 #define REMAP_SERVOS_5AND6 1
diff --git a/sw/airborne/boards/lisa_m_2.0.h b/sw/airborne/boards/lisa_m_2.0.h
index 244504950c..bf742454d2 100644
--- a/sw/airborne/boards/lisa_m_2.0.h
+++ b/sw/airborne/boards/lisa_m_2.0.h
@@ -172,13 +172,6 @@
 
 #define BOARD_HAS_BARO 1
 
-#define USE_OPENCM3 1
-
-// not needed with USE_OPENCM3:
-//#define HSE_TYPE_EXT_CLK
-//#define STM32_RCC_MODE RCC_HSE_ON
-//#define STM32_PLL_MULT RCC_PLLMul_6
-
 #define PWM_5AND6_TIMER TIM5
 #define PWM_5AND6_RCC RCC_APB1ENR_TIM5EN
 #define PWM5_OC 1