diff --git a/common/src/main/java/io/netty/util/ResourceLeakDetector.java b/common/src/main/java/io/netty/util/ResourceLeakDetector.java
index f85513aaf6..a13b59a75c 100644
--- a/common/src/main/java/io/netty/util/ResourceLeakDetector.java
+++ b/common/src/main/java/io/netty/util/ResourceLeakDetector.java
@@ -221,7 +221,7 @@ public class ResourceLeakDetector<T> {
         }
 
         if (level.ordinal() < Level.PARANOID.ordinal()) {
-            if ((leakCheckCnt ++ & mask) == 0) {
+            if ((++ leakCheckCnt & mask) == 0) {
                 reportLeak(level);
                 return new DefaultResourceLeak(obj);
             } else {