diff --git a/subworkflows/local/standardisation_profiles.nf b/subworkflows/local/standardisation_profiles.nf
index dde76c8..4ae44fd 100644
--- a/subworkflows/local/standardisation_profiles.nf
+++ b/subworkflows/local/standardisation_profiles.nf
@@ -33,7 +33,9 @@ workflow STANDARDISATION_PROFILES {
                             .groupTuple ()
                             .map { [ it[0], it[1].flatten() ] }
 
-    TAXPASTA_MERGE (ch_input_for_taxpasta, params.taxpasta_taxonomy_dir ? params.taxpasta_taxonomy_dir : [], [])
+    ch_taxpasta_tax_dir = params.taxpasta_taxonomy_dir ? Channel.fromPath(params.taxpasta_taxonomy_dir, checkIfExists: true).collect() : []
+
+    TAXPASTA_MERGE (ch_input_for_taxpasta, ch_taxpasta_tax_dir, [])
 
     /*
         Split profile results based on tool they come from