diff --git a/modules/nextflow/src/main/groovy/nextflow/config/ConfigBuilder.groovy b/modules/nextflow/src/main/groovy/nextflow/config/ConfigBuilder.groovy
index 841a1c9bcc..bd9a1b3840 100644
--- a/modules/nextflow/src/main/groovy/nextflow/config/ConfigBuilder.groovy
+++ b/modules/nextflow/src/main/groovy/nextflow/config/ConfigBuilder.groovy
@@ -684,6 +684,7 @@ class ConfigBuilder {
 
         // -- sets the messages options
         if( cmdRun.withWebLog ) {
+            log.warn "The command line option '-with-weblog' is deprecated - consider enabling this feature by setting 'weblog.enabled=true' in your configuration file"
             if( !(config.weblog instanceof Map) )
                 config.weblog = [:]
             config.weblog.enabled = true