diff --git a/dd-java-agent/agent-debugger/debugger-el/src/main/java/com/datadog/debugger/el/expressions/BinaryOperator.java b/dd-java-agent/agent-debugger/debugger-el/src/main/java/com/datadog/debugger/el/expressions/BinaryOperator.java
index ae4d4183b96..ce5784b918b 100644
--- a/dd-java-agent/agent-debugger/debugger-el/src/main/java/com/datadog/debugger/el/expressions/BinaryOperator.java
+++ b/dd-java-agent/agent-debugger/debugger-el/src/main/java/com/datadog/debugger/el/expressions/BinaryOperator.java
@@ -19,7 +19,7 @@ public Boolean apply(
     }
   };
 
-  private String symbol;
+  private final String symbol;
 
   BinaryOperator(String symbol) {
     this.symbol = symbol;