diff --git a/polygon/rest/base.py b/polygon/rest/base.py
index 3507ed02..1ea6e9be 100644
--- a/polygon/rest/base.py
+++ b/polygon/rest/base.py
@@ -148,7 +148,7 @@ def _get_params(
                         or argname.endswith("_gte")
                         or argname.endswith("_any_of")
                     ):
-                        argname = ".".join(argname.split("_", 1))
+                        argname = ".".join(argname[::-1].split("_", 1))[::-1]
                     if argname.endswith("any_of"):
                         val = ",".join(val)
                     params[argname] = val