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-rw-r--r--ice40/chip.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/ice40/chip.cc b/ice40/chip.cc
index 277246e5..1c854edf 100644
--- a/ice40/chip.cc
+++ b/ice40/chip.cc
@@ -190,7 +190,7 @@ WireId Chip::getWireBelPin(BelId bel, PortPin pin) const
assert(bel != BelId());
int num_bel_wires = chip_info.bel_data[bel.index].num_bel_wires;
- BelWirePOD *bel_wires = chip_info.bel_data[bel.index].bel_wires.ptr();
+ const BelWirePOD *bel_wires = chip_info.bel_data[bel.index].bel_wires.ptr();
for (int i = 0; i < num_bel_wires; i++)
if (bel_wires[i].port == pin) {