diff --git a/weboob/core/modules.py b/weboob/core/modules.py
index 0ed2bc3b..c48c2461 100644
--- a/weboob/core/modules.py
+++ b/weboob/core/modules.py
@@ -82,9 +82,7 @@ class Module(object):
         return self.klass.ICON
 
     def iter_caps(self):
-        for cap in self.klass.__bases__:
-            if issubclass(cap, IBaseCap) and cap != IBaseCap:
-                yield cap
+        return self.klass.iter_caps()
 
     def has_caps(self, *caps):
         for c in caps:
diff --git a/weboob/tools/backend.py b/weboob/tools/backend.py
index 9bd3e4b1..54d1463f 100644
--- a/weboob/tools/backend.py
+++ b/weboob/tools/backend.py
@@ -193,10 +193,15 @@ class BaseBackend(object):
 
         return self.BROWSER(*args, **kwargs)
 
-    def iter_caps(self):
-        for cap in self.__class__.__bases__:
-            if issubclass(cap, IBaseCap) and cap != IBaseCap:
-                yield cap
+    @classmethod
+    def iter_caps(klass):
+        def iter_caps(cls):
+            for base in cls.__bases__:
+                if issubclass(base, IBaseCap) and base != IBaseCap:
+                    yield base
+                    for cap in iter_caps(base):
+                        yield cap
+        return iter_caps(klass)
 
     def has_caps(self, *caps):
         for c in caps: