diff --git a/src/main/java/com/cohere/api/CohereBuilder.java b/src/main/java/com/cohere/api/CohereBuilder.java
index e6fa445..133039f 100644
--- a/src/main/java/com/cohere/api/CohereBuilder.java
+++ b/src/main/java/com/cohere/api/CohereBuilder.java
@@ -47,7 +47,7 @@ public Cohere build() {
             throw new RuntimeException("Please provide token or set the CO_API_KEY environment variable.");
         }
         this.clientOptionsBuilder.addHeader("Authorization", "Bearer " + this.token);
-        if (clientName.isPresent()) {
+        if (clientName != null) {
             this.clientOptionsBuilder.addHeader("X-Client-Name", this.clientName);
         }
         clientOptionsBuilder.environment(this.environment);