diff --git a/src/main/java/bytecode/MethodCodeGen.java b/src/main/java/bytecode/MethodCodeGen.java
index ba19f50..6506d8f 100644
--- a/src/main/java/bytecode/MethodCodeGen.java
+++ b/src/main/java/bytecode/MethodCodeGen.java
@@ -736,6 +736,9 @@ public class MethodCodeGen implements bytecode.visitor.MethodVisitor {
             expressionNode.accept(this);
             parameterNodes.add(new ParameterNode(expressionNode.getType(), ""));
         }
+        if(methodCallNode.type == null) {
+            methodCallNode.type = new BaseType(TypeEnum.INT);
+        }
         methodVisitor.visitMethodInsn(INVOKEVIRTUAL, methodCallNode.target.memberAccess.identifiers.get(0), methodCallNode.identifier, mapper.generateMethodDescriptor(methodCallNode.type, parameterNodes), false);
     }
 }