diff --git a/platforms/nuttx/src/px4/stm/stm32_common/tone_alarm/ToneAlarmInterfacePWM.cpp b/platforms/nuttx/src/px4/stm/stm32_common/tone_alarm/ToneAlarmInterfacePWM.cpp
index 6ba13e65ac..f83cdfebea 100644
--- a/platforms/nuttx/src/px4/stm/stm32_common/tone_alarm/ToneAlarmInterfacePWM.cpp
+++ b/platforms/nuttx/src/px4/stm/stm32_common/tone_alarm/ToneAlarmInterfacePWM.cpp
@@ -48,6 +48,24 @@
 #define TONE_ALARM_COUNTER_PERIOD 65536
 #endif
 
+/* The H7 has a 2 RCC_APB1ENR registers RCC_APB1LENR and RCC_APB1HENR
+ * We simply map the RCC_APB1LENR back to STM32_RCC_APB1ENR as well as
+ * the bits
+ */
+
+#if !defined(STM32_RCC_APB1ENR) && defined(STM32_RCC_APB1LENR)
+# define STM32_RCC_APB1ENR STM32_RCC_APB1LENR
+
+# define RCC_APB1ENR_TIM2EN  RCC_APB1LENR_TIM2EN
+# define RCC_APB1ENR_TIM3EN  RCC_APB1LENR_TIM3EN
+# define RCC_APB1ENR_TIM4EN  RCC_APB1LENR_TIM4EN
+# define RCC_APB1ENR_TIM5EN  RCC_APB1LENR_TIM5EN
+# define RCC_APB1ENR_TIM6EN  RCC_APB1LENR_TIM6EN
+# define RCC_APB1ENR_TIM7EN  RCC_APB1LENR_TIM7EN
+# define RCC_APB1ENR_TIM12EN RCC_APB1LENR_TIM12EN
+# define RCC_APB1ENR_TIM13EN RCC_APB1LENR_TIM13EN
+# define RCC_APB1ENR_TIM14EN RCC_APB1LENR_TIM14EN
+#endif
 /* Tone alarm configuration */
 #if   TONE_ALARM_TIMER == 1
 # define TONE_ALARM_BASE                STM32_TIM1_BASE