diff --git a/core-java-modules/core-java-strings/src/main/java/com/baeldung/stringbuffer/ComparePerformance.java b/core-java-modules/core-java-strings/src/main/java/com/baeldung/stringbuffer/ComparePerformance.java
index 28cd2e64e9..4d045fe318 100644
--- a/core-java-modules/core-java-strings/src/main/java/com/baeldung/stringbuffer/ComparePerformance.java
+++ b/core-java-modules/core-java-strings/src/main/java/com/baeldung/stringbuffer/ComparePerformance.java
@@ -28,6 +28,7 @@ public class ComparePerformance {
 
     @Benchmark
     public String benchmarkStringConcatenation() {
+        strFinal = "";
         strFinal += strInitial;
         return strFinal;
     }