diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6bdd64ec..dbbdd005 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@
 
  - **aiken**: added a `blueprint policy` command to compute the policy ID of a minting script
 
+### Fixed
+
+ - **aiken-lang**: Prevent mutual recursion caused by conflicting function names for generic expect type
+ 
 ### Changed
 
 ### Removed
diff --git a/crates/aiken-lang/src/gen_uplc.rs b/crates/aiken-lang/src/gen_uplc.rs
index 851b91ac..59b7f84b 100644
--- a/crates/aiken-lang/src/gen_uplc.rs
+++ b/crates/aiken-lang/src/gen_uplc.rs
@@ -19,7 +19,7 @@ use crate::{
     builtins::{bool, data, void},
     expr::TypedExpr,
     gen_uplc::builder::{
-        find_and_replace_generics, get_generic_id_and_type, get_variant_name,
+        find_and_replace_generics, get_arg_type_name, get_generic_id_and_type, get_variant_name,
         lookup_data_type_by_tipo,
     },
     tipo::{
@@ -2533,7 +2533,11 @@ impl<'a> CodeGenerator<'a> {
             let mut func_stack = expect_stack.empty_with_scope();
             let mut call_stack = expect_stack.empty_with_scope();
 
-            let mut data_type_variant = String::new();
+            let mut data_type_variant = tipo
+                .get_inner_types()
+                .iter()
+                .map(|arg| get_arg_type_name(arg))
+                .join("_");
 
             if let Some(types) = tipo.arg_types() {
                 for mut tipo in types {
diff --git a/crates/aiken-lang/src/gen_uplc/builder.rs b/crates/aiken-lang/src/gen_uplc/builder.rs
index 21a89115..246a94b3 100644
--- a/crates/aiken-lang/src/gen_uplc/builder.rs
+++ b/crates/aiken-lang/src/gen_uplc/builder.rs
@@ -2029,3 +2029,15 @@ pub fn special_case_builtin(
         _ => unreachable!(),
     }
 }
+
+pub fn get_arg_type_name(tipo: &Type) -> String {
+    match tipo {
+        Type::App { name, .. } => name.clone(),
+        Type::Var { tipo } => match tipo.borrow().clone() {
+            TypeVar::Link { tipo } => get_arg_type_name(tipo.as_ref()),
+            _ => unreachable!(),
+        },
+        Type::Tuple { .. } => "".to_string(),
+        _ => unreachable!(),
+    }
+}
diff --git a/examples/acceptance_tests/086/aiken.lock b/examples/acceptance_tests/086/aiken.lock
new file mode 100644
index 00000000..0423f31b
--- /dev/null
+++ b/examples/acceptance_tests/086/aiken.lock
@@ -0,0 +1,13 @@
+# This file was generated by Aiken
+# You typically do not need to edit this file
+
+[[requirements]]
+name = "aiken-lang/stdlib"
+version = "main"
+source = "github"
+
+[[packages]]
+name = "aiken-lang/stdlib"
+version = "main"
+requirements = []
+source = "github"
diff --git a/examples/acceptance_tests/086/aiken.toml b/examples/acceptance_tests/086/aiken.toml
new file mode 100644
index 00000000..914a1b5a
--- /dev/null
+++ b/examples/acceptance_tests/086/aiken.toml
@@ -0,0 +1,8 @@
+name = "aiken-lang/acceptance_test_086"
+version = "0.0.0"
+description = ""
+
+[[dependencies]]
+name = 'aiken-lang/stdlib'
+version = 'main'
+source = 'github'
diff --git a/examples/acceptance_tests/086/plutus.json b/examples/acceptance_tests/086/plutus.json
new file mode 100644
index 00000000..415663f0
--- /dev/null
+++ b/examples/acceptance_tests/086/plutus.json
@@ -0,0 +1,32 @@
+{
+  "preamble": {
+    "title": "aiken-lang/acceptance_test_086",
+    "version": "0.0.0",
+    "plutusVersion": "v2"
+  },
+  "validators": [
+    {
+      "title": "other.validate",
+      "datum": {
+        "title": "raw_datum",
+        "schema": {
+          "$ref": "#/definitions/Data"
+        }
+      },
+      "redeemer": {
+        "title": "_redeemer",
+        "schema": {
+          "$ref": "#/definitions/Data"
+        }
+      },
+      "compiledCode": "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",
+      "hash": "6a76fed919611638154fbaf78bd7a37f98b77e42eebc615f2d2d0f32"
+    }
+  ],
+  "definitions": {
+    "Data": {
+      "title": "Data",
+      "description": "Any Plutus data."
+    }
+  }
+}
\ No newline at end of file
diff --git a/examples/acceptance_tests/086/validators/other.ak b/examples/acceptance_tests/086/validators/other.ak
new file mode 100644
index 00000000..7dcd3aee
--- /dev/null
+++ b/examples/acceptance_tests/086/validators/other.ak
@@ -0,0 +1,21 @@
+use aiken/transaction.{ScriptContext}
+use aiken/transaction/credential.{Address}
+
+type TestData {
+  addr: Address,
+}
+
+type TestDatum {
+  data: Option<TestData>,
+}
+
+validator {
+  fn validate(raw_datum: Data, _redeemer: Data, _context: ScriptContext) -> Bool {
+    expect datum: TestDatum = raw_datum
+    let TestDatum { data } = datum
+    when data is {
+      Some(_) -> True
+      None -> False
+    }
+  }
+}