diff --git a/src/lib.rs b/src/lib.rs
index 991f2c4..bfae1ed 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -586,10 +586,11 @@ fn lookup_filename_in_vault<'a>(
     // sentence even if the note is capitalized for example) so we also try a case-insensitive
     // lookup.
     vault_contents.iter().find(|path| {
+        let path_lowered = PathBuf::from(path.to_string_lossy().to_lowercase());
         path.ends_with(&filename)
-            || path.ends_with(&filename.to_lowercase())
+            || path_lowered.ends_with(&filename.to_lowercase())
             || path.ends_with(format!("{}.md", &filename))
-            || path.ends_with(format!("{}.md", &filename.to_lowercase()))
+            || path_lowered.ends_with(format!("{}.md", &filename.to_lowercase()))
     })
 }
 
diff --git a/tests/testdata/expected/main-samples/obsidian-wikilinks.md b/tests/testdata/expected/main-samples/obsidian-wikilinks.md
index a77822d..a27bd59 100644
--- a/tests/testdata/expected/main-samples/obsidian-wikilinks.md
+++ b/tests/testdata/expected/main-samples/obsidian-wikilinks.md
@@ -6,6 +6,8 @@ Link to [pure-markdown-examples > Heading 1](pure-markdown-examples.md#heading-1
 
 Link to [pure markdown examples](pure-markdown-examples.md#heading-1).
 
+Link to [uppercased-note](Uppercased-note.md).
+
 Link within backticks: `[[pure-markdown-examples]]`
 
 ````
diff --git a/tests/testdata/input/main-samples/Uppercased-note.md b/tests/testdata/input/main-samples/Uppercased-note.md
new file mode 100644
index 0000000..e69de29
diff --git a/tests/testdata/input/main-samples/obsidian-wikilinks.md b/tests/testdata/input/main-samples/obsidian-wikilinks.md
index 23d0970..543d9bc 100644
--- a/tests/testdata/input/main-samples/obsidian-wikilinks.md
+++ b/tests/testdata/input/main-samples/obsidian-wikilinks.md
@@ -6,6 +6,8 @@ Link to [[pure-markdown-examples#Heading 1]].
 
 Link to [[pure-markdown-examples#Heading 1|pure markdown examples]].
 
+Link to [[uppercased-note]].
+
 Link within backticks: `[[pure-markdown-examples]]`
 
 ```