diff --git a/backend/app/games/renpy_builds.py b/backend/app/games/renpy_builds.py
index 2ea4293..f1fea16 100644
--- a/backend/app/games/renpy_builds.py
+++ b/backend/app/games/renpy_builds.py
@@ -90,6 +90,18 @@ BUILDS: dict[str, dict] = {
         },
         "defects": {},
     },
+    "bb19a33af00324fa027a629c052aee885e72f1b7bee7074403a5b9e20c69e2d8": {
+        "id": "renpy/the-only-doe-0.05",
+        # One menu branch tests `... before_sleeping=2` (assignment), which Ren'Py cannot compile either:
+        # sleep.rpyc holds the same text. The port corrects the operator; the digest pins the exact line.
+        "lines": {
+            "sleep.rpy": {
+                "fa092f95dd51401da31285c68c7c4fa9ad9ae4a5dd8c1a1582192f32b1e650cf":
+                    '    elif wake_up_after_sex=="spitroast" and number_of_people_had_sex_with_before_sleeping==2:',
+            },
+        },
+        "defects": {},
+    },
 }
 
 
@@ -136,6 +148,19 @@ def identify(game_dir: Path) -> str | None:
     return build["id"] if build else None
 
 
+def _patch_lines(source: str, patches: dict[str, str]) -> str:
+    """Replace single lines whose exact text (without the line ending) matches a recorded SHA-256."""
+    if not patches:
+        return source
+    lines = source.splitlines(keepends=True)
+    for index, line in enumerate(lines):
+        text = line.rstrip("\r\n")
+        replacement = patches.get(hashlib.sha256(text.encode()).hexdigest())
+        if replacement is not None:
+            lines[index] = replacement + line[len(text):]
+    return "".join(lines)
+
+
 def prepare_source(build_id: str | None, relative: str, source: str) -> str:
     """Adapt verified engine integration blocks, preserving source line numbers.
 
@@ -145,6 +170,7 @@ def prepare_source(build_id: str | None, relative: str, source: str) -> str:
     from app.converter.rpy_lexer import parse_tree
 
     build = next((b for b in BUILDS.values() if b["id"] == build_id), {})
+    source = _patch_lines(source, build.get("lines", {}).get(relative.lower(), {}))
     patches = build.get("blocks", {}).get(relative.lower(), {})
     if not patches:
         return source
diff --git a/backend/tests/test_game_profiles.py b/backend/tests/test_game_profiles.py
index 692133b..9d851a1 100644
--- a/backend/tests/test_game_profiles.py
+++ b/backend/tests/test_game_profiles.py
@@ -52,3 +52,22 @@ def test_known_defects_are_waived_only_up_to_the_recorded_count():
     assert blocking == [new] and known == [known_issue]
     same_message_other_script = Issue(code, message, "SomewhereElse:1")
     assert split_known([same_message_other_script])[0] == [same_message_other_script]
+
+
+def test_known_build_line_patch_requires_the_exact_line():
+    import hashlib
+
+    from app.games import renpy_builds
+
+    wrong = '    elif wake_up_after_sex=="spitroast" and number_of_people_had_sex_with_before_sleeping=2:'
+    fixed = wrong.replace("=2:", "==2:")
+    assert hashlib.sha256(wrong.encode()).hexdigest() in renpy_builds.BUILDS[
+        "bb19a33af00324fa027a629c052aee885e72f1b7bee7074403a5b9e20c69e2d8"]["lines"]["sleep.rpy"]
+    source = f"label a:\r\n{wrong}\r\n    pass\r\n"
+    assert renpy_builds.prepare_source("renpy/the-only-doe-0.05", "Sleep.rpy", source) == \
+        f"label a:\r\n{fixed}\r\n    pass\r\n"
+    # another build, another file, or an edited line stays untouched
+    assert renpy_builds.prepare_source(None, "sleep.rpy", source) == source
+    assert renpy_builds.prepare_source("renpy/the-only-doe-0.05", "other.rpy", source) == source
+    edited = source.replace("spitroast", "other")
+    assert renpy_builds.prepare_source("renpy/the-only-doe-0.05", "sleep.rpy", edited) == edited