diff --git a/CHANGES.md b/CHANGES.md
index da4ac06..ab34de9 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -3,7 +3,8 @@
 ## 4.0.3 (unreleased)
 
 
-- Nothing changed yet.
+- Fix #45: Packages with capital names do not get ignored when checked out.
+  [jensens]
 
 
 ## 4.0.2 (2024-03-13)
diff --git a/src/mxdev/processing.py b/src/mxdev/processing.py
index ce4def6..280e8b4 100644
--- a/src/mxdev/processing.py
+++ b/src/mxdev/processing.py
@@ -54,11 +54,12 @@ def process_line(
     except Exception:
         pass
     else:
-        if parsed.name in package_keys:
+        parsed_name_lower = parsed.name.lower()
+        if parsed_name_lower in [k.lower() for k in package_keys]:
             line = f"# {line.strip()} -> mxdev disabled (source)\n"
-        if variety == "c" and parsed.name in override_keys:
+        if variety == "c" and parsed_name_lower in [k.lower() for k in override_keys]:
             line = f"# {line.strip()} -> mxdev disabled (override)\n"
-        if variety == "c" and parsed.name in ignore_keys:
+        if variety == "c" and parsed_name_lower in [k.lower() for k in ignore_keys]:
             line = f"# {line.strip()} -> mxdev disabled (ignore)\n"
     if variety == "c":
         return [], [line]