1 files changed, 1 insertions, 1 deletions
diff --git a/ecp5/arch.cc b/ecp5/arch.cc
index 93ed5788..a0d8e8ae 100644
--- a/ecp5/arch.cc
+++ b/ecp5/arch.cc
@@ -651,7 +651,7 @@ TimingPortClass Arch::getPortTimingClass(const CellInfo *cell, IdString port, in
         return TMG_IGNORE; // FIXME
     } else if (cell->type == id_EHXPLLL) {
         return TMG_IGNORE;
-    } else if (cell->type == id_DCUA) {
+    } else if (cell->type == id_DCUA || cell->type == id_EXTREFB || cell->type == id_PCSCLKDIV) {
         return TMG_IGNORE; // FIXME
     } else {
         NPNR_ASSERT_FALSE_STR("no timing data for cell type '" + cell->type.str(this) + "'");