diff --git a/elixir-mode.el b/elixir-mode.el
index 06dc1fde..e079a84d 100644
--- a/elixir-mode.el
+++ b/elixir-mode.el
@@ -427,7 +427,7 @@ is used to limit the scan."
      1 font-lock-variable-name-face)
 
     ;; Map keys
-    (,(elixir-rx (group (and identifiers ":")) space)
+    (,(elixir-rx (group (and identifiers ":")) (or space "\n"))
      1 elixir-atom-face)
 
     ;; Pseudovariables
diff --git a/tests/elixir-mode-font-test.el b/tests/elixir-mode-font-test.el
index 1ca470e8..1306b3f7 100644
--- a/tests/elixir-mode-font-test.el
+++ b/tests/elixir-mode-font-test.el
@@ -250,7 +250,12 @@ true_false_nil
   ;; https://github.com/elixir-editors/emacs-elixir/issues/320
   (elixir-test-with-temp-buffer
    "<<foo::bar>>"
-   (should-not (eq (elixir-test-face-at 3) 'elixir-atom-face))))
+   (should-not (eq (elixir-test-face-at 3) 'elixir-atom-face)))
+
+  (elixir-test-with-temp-buffer
+   "%{key:
+ a_very_long_value_that_needed_to_wrap}"
+   (should (eq (elixir-test-face-at 3) 'elixir-atom-face))))
 
 (ert-deftest elixir-mode-syntax-table/fontify-interpolation ()
   :tags '(fontification interpolation syntax-table)