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-rw-r--r--src/portable/nxp/lpc17_40/dcd_lpc17_40.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/portable/nxp/lpc17_40/dcd_lpc17_40.c b/src/portable/nxp/lpc17_40/dcd_lpc17_40.c
index 2b49f52e9..d5f90d2a7 100644
--- a/src/portable/nxp/lpc17_40/dcd_lpc17_40.c
+++ b/src/portable/nxp/lpc17_40/dcd_lpc17_40.c
@@ -293,7 +293,7 @@ bool dcd_edpt_open(uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc)
break;
case TUSB_XFER_ISOCHRONOUS:
- TU_ASSERT((epnum % 3) == 3 && (epnum != 15));
+ TU_ASSERT((epnum % 3) == 0 && (epnum != 0) && (epnum != 15));
break;
default: