diff --git a/java-client/src/main/java/co/elastic/clients/transport/endpoints/BooleanEndpoint.java b/java-client/src/main/java/co/elastic/clients/transport/endpoints/BooleanEndpoint.java
index e9c386c8e..03529d16a 100644
--- a/java-client/src/main/java/co/elastic/clients/transport/endpoints/BooleanEndpoint.java
+++ b/java-client/src/main/java/co/elastic/clients/transport/endpoints/BooleanEndpoint.java
@@ -39,7 +39,8 @@ public BooleanEndpoint(
 
     @Override
     public boolean isError(int statusCode) {
-        return statusCode >= 500;
+        // 404 indicates a 'false' result.
+        return statusCode != 404 && super.isError(statusCode);
     }
 
     public boolean getResult(int statusCode) {