diff --git a/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c b/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c
index c28613a03..309a32f31 100644
--- a/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c
+++ b/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c
@@ -80,6 +80,7 @@ static void can_lld_set_filters(CANDriver* canp,
                                 uint32_t can2sb,
                                 uint32_t num,
                                 const CANFilter *cfp) {
+
 #if STM32_CAN_USE_CAN2
   if(canp == &CAND2) {
     /* Set handle to CAN1, because CAN1 manages the filters of CAN2.*/
@@ -96,6 +97,7 @@ static void can_lld_set_filters(CANDriver* canp,
     canp->can->FMR = (canp->can->FMR & 0xFFFF0000) | (can2sb << 8) | CAN_FMR_FINIT;
   }
 #endif
+
 #if STM32_CAN_USE_CAN3
   if(canp == &CAND3) {
     rccEnableCAN3(FALSE);
@@ -121,6 +123,7 @@ static void can_lld_set_filters(CANDriver* canp,
       }
     }
 #endif
+
 #if STM32_CAN_USE_CAN3
     if(canp == &CAND3) {
       for (i = 0; i < STM32_CAN3_MAX_FILTERS; i++) {
@@ -129,6 +132,7 @@ static void can_lld_set_filters(CANDriver* canp,
       }
     }
 #endif
+
     /* Scanning the filters array.*/
     for (i = 0; i < num; i++) {
       fmask = 1 << cfp->filter;
@@ -1013,7 +1017,7 @@ void can_lld_wakeup(CANDriver *canp) {
 void canSTM32SetFilters(CANDriver *canp, uint32_t can2sb, uint32_t num, const CANFilter *cfp) {
 
 #if STM32_CAN_USE_CAN2
-  osalDbgCheck((can2sb >= 0) && (can2sb <= STM32_CAN_MAX_FILTERS) &&
+  osalDbgCheck((can2sb <= STM32_CAN_MAX_FILTERS) &&
                (num <= STM32_CAN_MAX_FILTERS));
 #endif