diff --git a/ch_util/tools.py b/ch_util/tools.py
index abb30a7d..b86fcb6c 100644
--- a/ch_util/tools.py
+++ b/ch_util/tools.py
@@ -1367,6 +1367,10 @@ def get_correlator_inputs(lay_time, correlator=None, connect=True):
             correlator = "FCC"
         elif correlator.lower() == "pco":
             correlator = "FCA"
+        elif correlator.lower() == "kko":
+            correlator = "FCA"
+        elif correlator.lower() == "gbo":
+            correlator = "FCG"
         elif correlator.lower() == "tone":
             # A hack to return GBO correlator inputs
             correlator = "tone"