diff --git a/src/c/core/session/write_access.c b/src/c/core/session/write_access.c
index 034ae658..db6e85b5 100644
--- a/src/c/core/session/write_access.c
+++ b/src/c/core/session/write_access.c
@@ -134,6 +134,10 @@ uint16_t uxr_prepare_output_stream(
 
         UXR_PREPARE_SHARED_MEMORY(session, entity_id, ub, (uint16_t) len, rv);
     }
+    else
+    {
+        UXR_UNLOCK_STREAM_ID(session, stream_id);
+    }
 
     return rv;
 }