diff --git a/src/dotenv/parser.py b/src/dotenv/parser.py
index 66773604..0704f709 100644
--- a/src/dotenv/parser.py
+++ b/src/dotenv/parser.py
@@ -27,7 +27,7 @@ def make_regex(string: str, extra_flags: int = 0) -> Pattern[str]:
 _unquoted_value = make_regex(r"([^\r\n]*)")
 _comment = make_regex(r"(?:[^\S\r\n]*#[^\r\n]*)?")
 _end_of_line = make_regex(r"[^\S\r\n]*(?:\r\n|\n|\r|$)")
-_rest_of_line = make_regex(r"[^\r\n]*(?:\r|\n|\r\n)?")
+_rest_of_line = make_regex(r"[^\r\n]*(?:\r\n|\n|\r)?")
 _double_quote_escapes = make_regex(r"\\[\\'\"abfnrtv]")
 _single_quote_escapes = make_regex(r"\\[\\']")
 
diff --git a/tests/test_parser.py b/tests/test_parser.py
index 4ec5a5af..0ee0e618 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -339,6 +339,23 @@
                 )
             ],
         ),
+        (
+            "a: b\r\nc=d",
+            [
+                Binding(
+                    key=None,
+                    value=None,
+                    original=Original(string="a: b\r\n", line=1),
+                    error=True,
+                ),
+                Binding(
+                    key="c",
+                    value="d",
+                    original=Original(string="c=d", line=2),
+                    error=False,
+                ),
+            ],
+        ),
         (
             "a=b\nc=d",
             [