diff --git a/src/bridge/bridge_constructor/constructors/embedded/constructor.py b/src/bridge/bridge_constructor/constructors/embedded/constructor.py
index af533eaa..93a8c082 100644
--- a/src/bridge/bridge_constructor/constructors/embedded/constructor.py
+++ b/src/bridge/bridge_constructor/constructors/embedded/constructor.py
@@ -35,7 +35,7 @@ class EmbeddedConstructor(base_constructor.Constructor):
         try:
             cb = self._signals_cbs["{category}"]["{name}"]
         except KeyError:
-            log.warning(u"ignoring signal {{}}: no callback registered".format({name}))
+            log.warning(u"ignoring signal {name}: no callback registered")
         else:
             cb({args_result})
 """
diff --git a/src/bridge/bridge_constructor/constructors/embedded/embedded_template.py b/src/bridge/bridge_constructor/constructors/embedded/embedded_template.py
index 0d9aaecd..512c0a0a 100644
--- a/src/bridge/bridge_constructor/constructors/embedded/embedded_template.py
+++ b/src/bridge/bridge_constructor/constructors/embedded/embedded_template.py
@@ -79,7 +79,7 @@ class _Bridge(object):
         try:
             cb = self._signals_cbs["plugin"][name]
         except KeyError:
-            log.warning(u"ignoring signal {}: no callback registered".format(name))
+            log.debug(u"ignoring signal {}: no callback registered".format(name))
         else:
             cb(*args, **kwargs)