diff --git a/src/calibre/devices/hanlin/driver.py b/src/calibre/devices/hanlin/driver.py
index 3fbec66987..37f8430a66 100644
--- a/src/calibre/devices/hanlin/driver.py
+++ b/src/calibre/devices/hanlin/driver.py
@@ -86,7 +86,7 @@ class SPECTRA(HANLINV3):
     gui_name = 'Spectra'
     PRODUCT_ID  = [0xa4a5]
 
-    FORMATS = ['epub', 'mobi', 'fb2', 'lit', 'prc', 'djvu', 'pdf', 'rtf', 'txt']
+    FORMATS = ['epub', 'mobi', 'fb2', 'lit', 'prc', 'chm', 'djvu', 'pdf', 'rtf', 'txt']
 
     SUPPORTS_SUB_DIRS = True
 
diff --git a/src/calibre/gui2/actions/similar_books.py b/src/calibre/gui2/actions/similar_books.py
index b7f406d904..af350835a9 100644
--- a/src/calibre/gui2/actions/similar_books.py
+++ b/src/calibre/gui2/actions/similar_books.py
@@ -27,7 +27,7 @@ class SimilarBooksAction(InterfaceAction):
             ac = self.create_action(spec=(text, icon, None, shortcut),
                     attr=target)
             m.addAction(ac)
-            m.triggered.connect(partial(self.show_similar_books, target))
+            ac.triggered.connect(partial(self.show_similar_books, target))
         self.qaction.setMenu(m)
         self.similar_menu = m