diff --git a/lib/config.py b/lib/config.py
index 54f80702ae4fa2a55fda519b98a870a34934a309..1905aa8be1b18a44c7379252b533594f96674d9b 100644
--- a/lib/config.py
+++ b/lib/config.py
@@ -854,7 +854,8 @@ class ConfigWriter:
 
     """
     return utils.MatchNameComponent(short_name,
-                                    self._config_data.instances.keys())
+                                    self._config_data.instances.keys(),
+                                    case_sensitive=False)
 
   def _UnlockedGetInstanceInfo(self, instance_name):
     """Returns information about an instance.
@@ -934,7 +935,8 @@ class ConfigWriter:
 
     """
     return utils.MatchNameComponent(short_name,
-                                    self._config_data.nodes.keys())
+                                    self._config_data.nodes.keys(),
+                                    case_sensitive=False)
 
   def _UnlockedGetNodeInfo(self, node_name):
     """Get the configuration of a node, as stored in the config.