diff --git a/dz3r-common/src/main/java/net/sf/dz3r/counter/AbsoluteIncrementAdapter.java b/dz3r-common/src/main/java/net/sf/dz3r/counter/AbsoluteIncrementAdapter.java
index 32bf5ab01..786964acb 100644
--- a/dz3r-common/src/main/java/net/sf/dz3r/counter/AbsoluteIncrementAdapter.java
+++ b/dz3r-common/src/main/java/net/sf/dz3r/counter/AbsoluteIncrementAdapter.java
@@ -31,7 +31,7 @@ public final Flux<T> split(Flux<T> snapshots) {
         return snapshots.flatMap(this::convert);
     }
 
-    private synchronized Flux<T> convert(T snapshot) {
+    private Flux<T> convert(T snapshot) {
 
         if (lastKnown == null) {