diff --git a/machxo2/pack.cc b/machxo2/pack.cc
index b9cf6fe9..e31d5066 100644
--- a/machxo2/pack.cc
+++ b/machxo2/pack.cc
@@ -1163,7 +1163,7 @@ class MachXO2Packer
                         }
                     }
                     if (!found)
-                        log_error("Unsupported frequency '%s' on %s '%s'\n", freq.c_str(), ci->type == id_OSCH ? "OSCH" : "OSCJ", ci->name.c_str(ctx));
+                        log_error("Unsupported frequency '%s' on %s '%s'\n", freq.c_str(), ci->type.c_str(ctx), ci->name.c_str(ctx));
                 }
             }
         }