diff --git a/bluepyefe/ecode/__init__.py b/bluepyefe/ecode/__init__.py
index 79f94a9..617f6ef 100644
--- a/bluepyefe/ecode/__init__.py
+++ b/bluepyefe/ecode/__init__.py
@@ -39,6 +39,8 @@
     "firepattern": step.Step,
     "sponnohold30": step.Step,
     "sponhold30": step.Step,
+    "spontnohold30": step.Step,
+    "sponthold30": step.Step,
     "starthold": step.Step,
     "startnohold": step.Step,
     "delta": step.Step,