diff --git a/utils/search/backends/solr555pysolr.py b/utils/search/backends/solr555pysolr.py
index e1c79937c..c60015496 100644
--- a/utils/search/backends/solr555pysolr.py
+++ b/utils/search/backends/solr555pysolr.py
@@ -261,7 +261,7 @@ def add_similarity_vectors_to_documents(self, sound_objects, documents):
                 similarity_vectors_per_analyzer_per_sound=[]
                 data = sa.get_analysis_data_from_file()
                 if data is not None:
-                    if data[config_options['vector_property_name']] is not None:
+                    if config_options['vector_property_name'] in data:
                         sim_vector_document_data = {
                             'content_type': SOLR_DOC_CONTENT_TYPES['similarity_vector'],
                             'analyzer': sa.analyzer,