diff --git a/refaster-support/src/main/java/tech/picnic/errorprone/refaster/matchers/IsIdentityOperation.java b/refaster-support/src/main/java/tech/picnic/errorprone/refaster/matchers/IsIdentityOperation.java
index 90835da4160..706d61428f2 100644
--- a/refaster-support/src/main/java/tech/picnic/errorprone/refaster/matchers/IsIdentityOperation.java
+++ b/refaster-support/src/main/java/tech/picnic/errorprone/refaster/matchers/IsIdentityOperation.java
@@ -10,7 +10,6 @@
 import com.sun.source.tree.ExpressionTree;
 import com.sun.source.tree.LambdaExpressionTree;
 import com.sun.source.tree.LambdaExpressionTree.BodyKind;
-import com.sun.source.tree.Tree.Kind;
 import java.util.function.DoubleUnaryOperator;
 import java.util.function.Function;
 import java.util.function.IntUnaryOperator;
@@ -49,7 +48,6 @@ private static Matcher<ExpressionTree> isIdentityLambdaExpression() {
         (tree, state) ->
             tree.getBodyKind() == BodyKind.EXPRESSION
                 && tree.getParameters().size() == 1
-                && tree.getBody().getKind() == Kind.IDENTIFIER
                 && ASTHelpers.getSymbol(tree.getParameters().get(0))
                     .equals(ASTHelpers.getSymbol(tree.getBody())));
   }
diff --git a/refaster-support/src/test/java/tech/picnic/errorprone/refaster/matchers/IsIdentityOperationTest.java b/refaster-support/src/test/java/tech/picnic/errorprone/refaster/matchers/IsIdentityOperationTest.java
index 7536befc3b4..324a8f784dd 100644
--- a/refaster-support/src/test/java/tech/picnic/errorprone/refaster/matchers/IsIdentityOperationTest.java
+++ b/refaster-support/src/test/java/tech/picnic/errorprone/refaster/matchers/IsIdentityOperationTest.java
@@ -25,6 +25,10 @@ void matches() {
             "    return (a, b) -> a;",
             "  }",
             "",
+            "  UnaryOperator<String> negative2() {",
+            "    return a -> a + a;",
+            "  }",
+            "",
             "  DoubleUnaryOperator positive1() {",
             "    // BUG: Diagnostic contains:",
             "    return DoubleUnaryOperator.identity();",