diff --git a/decompiler/backend/cexpressiongenerator.py b/decompiler/backend/cexpressiongenerator.py
index bfefdbf56..45f754fc3 100644
--- a/decompiler/backend/cexpressiongenerator.py
+++ b/decompiler/backend/cexpressiongenerator.py
@@ -7,7 +7,7 @@
 from decompiler.structures.pseudo import instructions as instructions
 from decompiler.structures.pseudo import operations as operations
 from decompiler.structures.pseudo.operations import MemberAccess
-from decompiler.structures.visitors.interfaces import DataflowObjectVisitorInterface, T
+from decompiler.structures.visitors.interfaces import DataflowObjectVisitorInterface
 
 
 class CExpressionGenerator(DataflowObjectVisitorInterface):
@@ -268,7 +268,7 @@ def visit_assignment(self, instr: instructions.Assignment) -> str:
             return f"{self.visit(op.operand)} = {self.visit(instr.value)}"
         return f"{self.visit(instr.destination)} = {self.visit(instr.value)}"
 
-    def visit_relation(self, instr: instructions.Relation) -> T:
+    def visit_relation(self, instr: instructions.Relation) -> str:
         raise NotImplementedError()
 
     def visit_generic_branch(self, instr: instructions.GenericBranch) -> str: