--- islandora.module
+++ islandora.module
@@ -58,7 +58,11 @@
 define('ISLANDORA_DATASTREAM_MODIFIED_HOOK', 'islandora_datastream_modified');
 define('ISLANDORA_DATASTREAM_PURGED_HOOK', 'islandora_datastream_purged');
 define('ISLANDORA_INGEST_STEP_HOOK', 'islandora_ingest_steps');
-define('ISLANDORA_DERVIATIVE_CREATION_HOOK', 'islandora_derivative');
+define('ISLANDORA_DERIVATIVE_CREATION_HOOK', 'islandora_derivative');
+// The "ISLANDORA_DERVIATIVE_CREATION_HOOK" constant has deprecated as of
+// 7.x-1.5, and should be removed after the next release.
+define('ISLANDORA_DERVIATIVE_CREATION_HOOK', ISLANDORA_DERIVATIVE_CREATION_HOOK);
+
 
 // Autocomplete paths.
 define('ISLANDORA_CONTENT_MODELS_AUTOCOMPLETE', 'islandora/autocomplete/content-models');