diff --git a/src/main/java/io/weaviate/client6/v1/api/collections/query/Hybrid.java b/src/main/java/io/weaviate/client6/v1/api/collections/query/Hybrid.java
index 4340c133e..897c09c29 100644
--- a/src/main/java/io/weaviate/client6/v1/api/collections/query/Hybrid.java
+++ b/src/main/java/io/weaviate/client6/v1/api/collections/query/Hybrid.java
@@ -187,6 +187,7 @@ private WeaviateProtoBaseSearch.Hybrid.Builder protoBuilder() {
     if (alpha != null) {
       hybrid.setAlpha(alpha);
       hybrid.setAlphaParam(alpha);
+      hybrid.setUseAlphaParam(true);
     }
 
     if (fusionType != null) {