diff --git a/tools/azure-sdk-tools/packaging_tools/change_log.py b/tools/azure-sdk-tools/packaging_tools/change_log.py
index fd5a43834646..1f6eed9faae7 100644
--- a/tools/azure-sdk-tools/packaging_tools/change_log.py
+++ b/tools/azure-sdk-tools/packaging_tools/change_log.py
@@ -67,7 +67,7 @@ def operation(self, diff_entry):
             return
 
         # Is this a new operation, inside a known operation group?
-        function_name, *remaining_path = remaining_path
+        function_name, parameter_name, *remaining_path = remaining_path
         if not remaining_path:
             if is_deletion:
                 self.breaking_changes.append(_REMOVE_OPERATION.format(operation_name, function_name))
@@ -80,7 +80,7 @@ def operation(self, diff_entry):
             return
 
         # So method signaure changed. Be vague for now
-        self.breaking_changes.append(_SIGNATURE_CHANGE.format(operation_name, function_name))
+        self.breaking_changes.append(_SIGNATURE_CHANGE.format(operation_name, function_name, parameter_name))
 
     def models(self, diff_entry):
         path, is_deletion = self._unpack_diff_entry(diff_entry)
@@ -144,7 +144,7 @@ def models(self, diff_entry):
 ## Breaking Changes
 _REMOVE_OPERATION_GROUP = "Removed operation group {}"
 _REMOVE_OPERATION = "Removed operation {}.{}"
-_SIGNATURE_CHANGE = "Operation {}.{} has a new signature"
+_SIGNATURE_CHANGE = "Operation {}.{} has a new signature {}"
 _MODEL_SIGNATURE_CHANGE = "Model {} has a new signature"
 _MODEL_PARAM_DELETE = "Model {} no longer has parameter {}"
 _MODEL_PARAM_ADD_REQUIRED = "Model {} has a new required parameter {}"