diff --git a/cpu/stm32/include/candev_stm32.h b/cpu/stm32/include/candev_stm32.h
index c87467ea9a..5e6a67fccb 100644
--- a/cpu/stm32/include/candev_stm32.h
+++ b/cpu/stm32/include/candev_stm32.h
@@ -37,13 +37,12 @@ extern "C" {
 
 #include "can/candev.h"
 
-#if defined(CPU_LINE_STM32F413xx) || defined(CPU_LINE_STM32F423xx)
-#define CANDEV_STM32_CHAN_NUMOF 3
-#elif defined(CPU_FAM_STM32F1) || defined(CPU_FAM_STM32F2) || defined(CPU_FAM_STM32F4)
-#define CANDEV_STM32_CHAN_NUMOF 2
-#elif defined(CPU_FAM_STM32F0) || defined(CPU_FAM_STM32F3) || \
-      defined(CPU_FAM_STM32L4) || defined(CPU_LINE_STM32F722xx) || DOXYGEN
 /** Number of channels in the device (up to 3) */
+#if defined(CAN3)
+#define CANDEV_STM32_CHAN_NUMOF 3
+#elif defined(CAN2)
+#define CANDEV_STM32_CHAN_NUMOF 2
+#elif defined(CAN1) || defined(CAN) || DOXYGEN
 #define CANDEV_STM32_CHAN_NUMOF 1
 #else
 #error "CAN STM32: CPU not supported"