diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ecc63017d21..0435312a37a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Use the correct property value for `place-content-between`, `place-content-around`, and `place-content-evenly` utilities ([#15440](https://github.com/tailwindlabs/tailwindcss/pull/15440))
+- Don’t detect arbitrary properties when preceded by an escape ([#15456](https://github.com/tailwindlabs/tailwindcss/pull/15456))
 
 ### Changed
 
diff --git a/crates/oxide/src/parser.rs b/crates/oxide/src/parser.rs
index 281774261ad6..1c8fdf75c0f2 100644
--- a/crates/oxide/src/parser.rs
+++ b/crates/oxide/src/parser.rs
@@ -595,7 +595,7 @@ impl<'a> Extractor<'a> {
     fn parse_start(&mut self) -> ParseAction<'a> {
         match self.cursor.curr {
             // Enter arbitrary property mode
-            b'[' => {
+            b'[' if self.cursor.prev != b'\\' => {
                 trace!("Arbitrary::Start\t");
                 self.arbitrary = Arbitrary::Brackets {
                     start_idx: self.cursor.pos,
@@ -1634,4 +1634,18 @@ mod test {
             ]
         );
     }
+
+    #[test]
+    fn arbitrary_properties_are_not_picked_up_after_an_escape() {
+        _please_trace();
+        let candidates = run(
+            r#"
+              <!-- [!code word:group-has-\\[a\\]\\:block] -->
+              \\[a\\]\\:block]
+            "#,
+            false,
+        );
+
+        assert_eq!(candidates, vec!["!code", "a"]);
+    }
 }