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-rw-r--r--src/portable/microchip/samd21/dcd_samd21.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/portable/microchip/samd21/dcd_samd21.c b/src/portable/microchip/samd21/dcd_samd21.c
index 7b2a57eeb..6140812bc 100644
--- a/src/portable/microchip/samd21/dcd_samd21.c
+++ b/src/portable/microchip/samd21/dcd_samd21.c
@@ -296,7 +296,7 @@ void maybe_transfer_complete(void) {
uint32_t epintflag = ep->EPINTFLAG.reg;
- uint16_t total_transfer_size;
+ uint16_t total_transfer_size = 0;
// Handle IN completions
if ((epintflag & USB_DEVICE_EPINTFLAG_TRCPT1) != 0) {