1 files changed, 6 insertions, 3 deletions
diff --git a/src/device/usbd.c b/src/device/usbd.c
index f485b6872..2a6081673 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -97,16 +97,19 @@ TU_ATTR_WEAK void dcd_disconnect(uint8_t rhport) {
   (void) rhport;
 }
 
-TU_ATTR_WEAK void dcd_dcache_clean(const void* addr, uint32_t data_size) {
+TU_ATTR_WEAK bool dcd_dcache_clean(const void* addr, uint32_t data_size) {
   (void) addr; (void) data_size;
+  return true;
 }
 
-TU_ATTR_WEAK void dcd_dcache_invalidate(const void* addr, uint32_t data_size) {
+TU_ATTR_WEAK bool dcd_dcache_invalidate(const void* addr, uint32_t data_size) {
   (void) addr; (void) data_size;
+  return true;
 }
 
-TU_ATTR_WEAK void dcd_dcache_clean_invalidate(const void* addr, uint32_t data_size) {
+TU_ATTR_WEAK bool dcd_dcache_clean_invalidate(const void* addr, uint32_t data_size) {
   (void) addr; (void) data_size;
+  return true;
 }
 
 //--------------------------------------------------------------------+