diff --git a/pythonx/jedi_vim.py b/pythonx/jedi_vim.py
index be42671..b88f439 100644
--- a/pythonx/jedi_vim.py
+++ b/pythonx/jedi_vim.py
@@ -475,6 +475,7 @@ def show_call_signatures(signatures=()):
     if int(vim_eval("g:jedi#show_call_signatures")) == 2:
         return cmdline_call_signatures(signatures)
 
+    seen_sigs = []
     for i, signature in enumerate(signatures):
         line, column = signature.bracket_start
         # signatures are listed above each other
@@ -497,6 +498,11 @@ def show_call_signatures(signatures=()):
         except (IndexError, TypeError):
             pass
 
+        # Skip duplicates.
+        if params in seen_sigs:
+            continue
+        seen_sigs.append(params)
+
         # This stuff is reaaaaally a hack! I cannot stress enough, that
         # this is a stupid solution. But there is really no other yet.
         # There is no possibility in VIM to draw on the screen, but there