diff --git a/evennia/prototypes/prototypes.py b/evennia/prototypes/prototypes.py
index de8d775054..72ae14154a 100644
--- a/evennia/prototypes/prototypes.py
+++ b/evennia/prototypes/prototypes.py
@@ -516,6 +516,10 @@ def search_prototype(key=None, tags=None, require_single=False, return_iterators
         be found as a match.
 
     """
+    # prototype keys are always in lowecase
+    if key:
+      key = key.lower()
+
     # search module prototypes
 
     mod_matches = {}
diff --git a/evennia/prototypes/tests.py b/evennia/prototypes/tests.py
index 7b83ff2dff..40560c3fd8 100644
--- a/evennia/prototypes/tests.py
+++ b/evennia/prototypes/tests.py
@@ -335,6 +335,8 @@ class TestProtLib(EvenniaTest):
         self.assertTrue(match)
         match = protlib.search_prototype(self.prot["prototype_key"])
         self.assertEqual(match, [self.prot])
+        match = protlib.search_prototype(self.prot["prototype_key"].upper())
+        self.assertEqual(match, [self.prot])
 
 
 class TestProtFuncs(EvenniaTest):