diff --git a/django/contrib/staticfiles/storage.py b/django/contrib/staticfiles/storage.py
index 5fa088a29a..07999e00cb 100644
--- a/django/contrib/staticfiles/storage.py
+++ b/django/contrib/staticfiles/storage.py
@@ -54,7 +54,7 @@ class HashedFilesMixin:
         )),
         ('*.js', (
             (
-                r'(?P<matched>)^(//# (?-i:sourceMappingURL)=(?P<url>.*))$',
+                r'(?m)(?P<matched>)^(//# (?-i:sourceMappingURL)=(?P<url>.*))$',
                 '//# sourceMappingURL=%(url)s',
             ),
             (
diff --git a/tests/staticfiles_tests/project/documents/cached/source_map.js b/tests/staticfiles_tests/project/documents/cached/source_map.js
index b37c5e5701..9d417868a0 100644
--- a/tests/staticfiles_tests/project/documents/cached/source_map.js
+++ b/tests/staticfiles_tests/project/documents/cached/source_map.js
@@ -1 +1,2 @@
 //# sourceMappingURL=source_map.js.map
+let a_variable = 1;
diff --git a/tests/staticfiles_tests/test_storage.py b/tests/staticfiles_tests/test_storage.py
index 0a34f64394..93335480be 100644
--- a/tests/staticfiles_tests/test_storage.py
+++ b/tests/staticfiles_tests/test_storage.py
@@ -260,7 +260,7 @@ class TestHashedFiles:
 
     def test_js_source_map(self):
         relpath = self.hashed_file_path('cached/source_map.js')
-        self.assertEqual(relpath, 'cached/source_map.9371cbb02a26.js')
+        self.assertEqual(relpath, 'cached/source_map.cd45b8534a87.js')
         with storage.staticfiles_storage.open(relpath) as relfile:
             content = relfile.read()
             self.assertNotIn(b'//# sourceMappingURL=source_map.js.map', content)