diff --git a/techlibs/common/cellhelp.py b/techlibs/common/cellhelp.py
index 8d0d7d757..4d40b73c0 100644
--- a/techlibs/common/cellhelp.py
+++ b/techlibs/common/cellhelp.py
@@ -53,6 +53,8 @@ for line in fileinput.input():
         # no module definition, ignore line
         pass
     if line.startswith("endmodule"):
+        if not simHelper.desc:
+            simHelper.desc.append("No help message for this cell type found.\n")
         print(simHelper)
         simHelper = SimHelper()