diff --git a/ontopy/excelparser.py b/ontopy/excelparser.py
index 1462659aa..02cd9c49f 100755
--- a/ontopy/excelparser.py
+++ b/ontopy/excelparser.py
@@ -808,7 +808,7 @@ def _add_entities(
                     or row["Other annotations"] == "nan"
                 ):
                     for annotation in row["Other annotations"].split(";"):
-                        key, value = annotation.split("=")
+                        key, value = annotation.split("=", 1)
                         entity[key.strip(" ")] = english(value.strip(" "))
 
             remaining_rows.difference_update(added_rows)
diff --git a/tests/test_excelparser/onto.xlsx b/tests/test_excelparser/onto.xlsx
index 3e7a07528..0c926c48d 100644
Binary files a/tests/test_excelparser/onto.xlsx and b/tests/test_excelparser/onto.xlsx differ
diff --git a/tests/test_excelparser/result_ontology/fromexcelonto.ttl b/tests/test_excelparser/result_ontology/fromexcelonto.ttl
index 56c85c7bc..5da686a69 100644
--- a/tests/test_excelparser/result_ontology/fromexcelonto.ttl
+++ b/tests/test_excelparser/result_ontology/fromexcelonto.ttl
@@ -72,7 +72,7 @@
 
 :EMMO_7c8ba943-15cf-5621-98a3-ed1e7e68fee8 a owl:Class ;
     emmo:EMMO_967080e5_2f42_4eb2_a3a9_c58143e835f9 "A special boundary."@en ;
-    :EMMO_98871837-aa90-5eef-9a56-926ae8beebbb "\"A text about this type of boundary\""@en ;
+    :EMMO_98871837-aa90-5eef-9a56-926ae8beebbb "\"A text about this type of=boundary\""@en ;
     rdfs:subClassOf :EMMO_1b2bfe71-5da9-5c46-b137-be45c3e3f9c3 ;
     skos:prefLabel "SpecialBoundary"@en .