1 files changed, 11 insertions, 0 deletions
diff --git a/ice40/chip.h b/ice40/chip.h
index 9d647756..d3eb7c70 100644
--- a/ice40/chip.h
+++ b/ice40/chip.h
@@ -743,4 +743,15 @@ struct Chip
 
 NEXTPNR_NAMESPACE_END
 
+namespace std {
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX BelType>
+{
+    std::size_t operator()(NEXTPNR_NAMESPACE_PREFIX BelType bt) const
+    noexcept
+    {
+        return std::hash<int>()(int(bt));
+    }
+};
+} // namespace std
+
 #endif