diff --git a/examples/pipeline/wikidata_entity_linking.py b/examples/pipeline/wikidata_entity_linking.py
index 287e4a50b..02a766d0f 100644
--- a/examples/pipeline/wikidata_entity_linking.py
+++ b/examples/pipeline/wikidata_entity_linking.py
@@ -61,13 +61,13 @@ def create_kb(vocab, max_entities_per_alias, min_occ, to_print=False):
     entity_frequencies = _get_entity_frequencies(entities=title_list)
 
     print()
-    print("3. _add_entities", datetime.datetime.now())
+    print("3. adding", len(entity_list), "entities", datetime.datetime.now())
     print()
     kb.set_entities(entity_list=entity_list, prob_list=entity_frequencies, vector_list=None, feature_list=None)
     # _add_entities(kb, entities=entity_list, probs=entity_frequencies, to_print=to_print)
 
     print()
-    print("4. _add_aliases", datetime.datetime.now())
+    print("4. adding aliases", datetime.datetime.now())
     print()
     _add_aliases(kb, title_to_id=title_to_id, max_entities_per_alias=max_entities_per_alias, min_occ=min_occ,)
 
@@ -171,7 +171,10 @@ def _add_aliases(kb, title_to_id, max_entities_per_alias, min_occ, to_print=Fals
                             prior_probs.append(p_entity_givenalias)
 
                     if selected_entities:
-                        kb.add_alias(alias=previous_alias, entities=selected_entities, probabilities=prior_probs)
+                        try:
+                            kb.add_alias(alias=previous_alias, entities=selected_entities, probabilities=prior_probs)
+                        except ValueError as e:
+                            print(e)
                 total_count = 0
                 counts = list()
                 entities = list()
diff --git a/spacy/kb.pyx b/spacy/kb.pyx
index ba870661d..d471130d0 100644
--- a/spacy/kb.pyx
+++ b/spacy/kb.pyx
@@ -179,9 +179,9 @@ cdef class KnowledgeBase:
                                                 entities_length=len(entities),
                                                 probabilities_length=len(probabilities)))
 
-        # Throw an error if the probabilities sum up to more than 1
+        # Throw an error if the probabilities sum up to more than 1 (allow for some rounding errors)
         prob_sum = sum(probabilities)
-        if prob_sum > 1:
+        if prob_sum > 1.00001:
             raise ValueError(Errors.E133.format(alias=alias, sum=prob_sum))
 
         cdef hash_t alias_hash = self.vocab.strings.add(alias)