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-rw-r--r--ice40/arch.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/ice40/arch.cc b/ice40/arch.cc
index b8bb13ea..1e7a383b 100644
--- a/ice40/arch.cc
+++ b/ice40/arch.cc
@@ -640,7 +640,7 @@ std::vector<GroupId> Arch::getGroupGroups(GroupId group) const
bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t &budget) const
{
const auto &driver = net_info->driver;
- if (driver.port == id_cout) {
+ if (driver.port == id_cout && sink.port == id_cin) {
auto driver_loc = getBelLocation(driver.cell->bel);
auto sink_loc = getBelLocation(sink.cell->bel);
if (driver_loc.y == sink_loc.y)