diff --git a/libuavcan_drivers/stm32/driver/src/uc_stm32_can.cpp b/libuavcan_drivers/stm32/driver/src/uc_stm32_can.cpp
index 025408c565..70ffce0760 100644
--- a/libuavcan_drivers/stm32/driver/src/uc_stm32_can.cpp
+++ b/libuavcan_drivers/stm32/driver/src/uc_stm32_can.cpp
@@ -732,9 +732,15 @@ fail:
 
 #if UAVCAN_STM32_NUTTX
     // TODO: Unattach and disable all IRQs
-    modifyreg32(STM32_RCC_APB1ENR, RCC_APB1ENR_CAN1EN | RCC_APB1ENR_CAN2EN, 0);
+    modifyreg32(STM32_RCC_APB1ENR, RCC_APB1ENR_CAN1EN, 0);
+# if UAVCAN_STM32_NUM_IFACES > 1
+    modifyreg32(STM32_RCC_APB1ENR, RCC_APB1ENR_CAN2EN, 0);
+# endif
 #else
-    RCC->APB1ENR &= ~(RCC_APB1ENR_CAN1EN | RCC_APB1ENR_CAN2EN);
+    RCC->APB1ENR &= ~RCC_APB1ENR_CAN1EN;
+# if UAVCAN_STM32_NUM_IFACES > 1
+    RCC->APB1ENR &= ~RCC_APB1ENR_CAN2EN;
+# endif
 #endif
     return res;
 }