diff --git a/providers/base/src/lib.rs b/providers/base/src/lib.rs
index 6d0199e..c794f5d 100644
--- a/providers/base/src/lib.rs
+++ b/providers/base/src/lib.rs
@@ -103,6 +103,9 @@ pub enum LessonType {
 
     /// Практическое занятие.
     Practice,
+
+    /// Дифференцированный зачёт.
+    DifferentiatedExam,
 }
 
 #[derive(Clone, Hash, Debug, Serialize, Deserialize, ToSchema)]
diff --git a/providers/provider-engels-polytechnic/src/parser/mod.rs b/providers/provider-engels-polytechnic/src/parser/mod.rs
index 3fe3202..2b9bd1a 100644
--- a/providers/provider-engels-polytechnic/src/parser/mod.rs
+++ b/providers/provider-engels-polytechnic/src/parser/mod.rs
@@ -187,6 +187,7 @@ fn guess_lesson_type(text: &str) -> Option<LessonType> {
             ("курсовой проект", LessonType::CourseProject),
             ("защита курсового проекта", LessonType::CourseProjectDefense),
             ("практическое занятие", LessonType::Practice),
+            ("дифференцированный зачет", LessonType::DifferentiatedExam),
         ])
     });