diff --git a/src/ca/cadef.h b/src/ca/cadef.h
index 4d3be961e..8ef3fa099 100644
--- a/src/ca/cadef.h
+++ b/src/ca/cadef.h
@@ -213,6 +213,7 @@ epicsShareFunc int epicsShareAPI ca_task_initialize (void);
 enum ca_preemptive_callback_select 
 { ca_disable_preemptive_callback, ca_enable_preemptive_callback };
 epicsShareFunc int epicsShareAPI ca_context_create (enum ca_preemptive_callback_select select);
+epicsShareFunc void epicsShareAPI ca_detach_context (); 
 
 /************************************************************************/
 /*  Remove CA facility from your task                                   */