diff --git a/contracts/Test.sol b/contracts/Test.sol
index 13dcd44..0f08f89 100644
--- a/contracts/Test.sol
+++ b/contracts/Test.sol
@@ -276,3 +276,16 @@ library UdvtConflict {
         return mySecondType.unwrap(t);
     }
 }
+
+library UdvtNoConflict {
+    type myFirstType is bytes32;
+    type mySecondType is uint256;
+
+    function unwrap(myFirstType t) internal pure returns (bytes32) {
+        return myFirstType.unwrap(t);
+    }
+
+    function unwrap(mySecondType t) internal pure returns (uint256) {
+        return mySecondType.unwrap(t);
+    }
+}
diff --git a/src/core.test.ts.md b/src/core.test.ts.md
index d6b89b9..33f56c4 100644
--- a/src/core.test.ts.md
+++ b/src/core.test.ts.md
@@ -841,6 +841,23 @@ Generated by [AVA](https://avajs.dev).
     ␊
         receive() external payable {}␊
     }␊
+    ␊
+    contract $UdvtNoConflict {␊
+        bytes32 public constant __hh_exposed_bytecode_marker = "hardhat-exposed";␊
+    ␊
+        constructor() payable {␊
+        }␊
+    ␊
+        function $unwrap(UdvtNoConflict.myFirstType t) external pure returns (bytes32 ret0) {␊
+            (ret0) = UdvtNoConflict.unwrap(t);␊
+        }␊
+    ␊
+        function $unwrap(UdvtNoConflict.mySecondType t) external pure returns (uint256 ret0) {␊
+            (ret0) = UdvtNoConflict.unwrap(t);␊
+        }␊
+    ␊
+        receive() external payable {}␊
+    }␊
     `
 
 ## snapshot initializers
diff --git a/src/core.test.ts.snap b/src/core.test.ts.snap
index d19911a..1952adc 100644
Binary files a/src/core.test.ts.snap and b/src/core.test.ts.snap differ
diff --git a/src/core.ts b/src/core.ts
index 6715548..de29d29 100644
--- a/src/core.ts
+++ b/src/core.ts
@@ -518,17 +518,13 @@ function getVarUdvtType(varDecl: VariableDeclaration, context: ContractDefinitio
 }
 
 function getUdvtType(typeName: TypeName, context: ContractDefinition, deref: ASTDereferencer, location: StorageLocation | null): string | undefined {
-  const { typeString, typeIdentifier } = typeName.typeDescriptions;
-  if (typeof typeString !== 'string' || typeof typeIdentifier !== 'string') {
-    throw new Error('Missing type information');
-  }
+  try {
+    if (typeName.nodeType === 'UserDefinedTypeName') {
+      return deref('UserDefinedValueTypeDefinition', typeName.referencedDeclaration).underlyingType.typeDescriptions.typeString ?? undefined;
+    }
+  } catch { /* passthrough */ }
 
-  // TODO: recover UDVT underlying properly
-  if (typeIdentifier.startsWith('t_userDefinedValueType')) {
-    return 'bytes32';
-  } else {
-    return undefined;
-  }
+  return undefined;
 }
 
 function getVariables(contract: ContractDefinition, deref: ASTDereferencer, subset?: Visibility[]): VariableDeclaration[] {