diff --git a/hy/completer.py b/hy/completer.py
index f14ec28..a6bfa83 100644
--- a/hy/completer.py
+++ b/hy/completer.py
@@ -38,4 +38,4 @@ except ImportError:
     pass
 else:
     readline.set_completer(Completer().complete)
-    readline.set_completer_delims("()[]{}")
+    readline.set_completer_delims("()[]{} ")