diff --git a/src/prompt_toolkit/key_binding/bindings/auto_suggest.py b/src/prompt_toolkit/key_binding/bindings/auto_suggest.py
index 32006f13a..3d8a843d4 100644
--- a/src/prompt_toolkit/key_binding/bindings/auto_suggest.py
+++ b/src/prompt_toolkit/key_binding/bindings/auto_suggest.py
@@ -59,7 +59,7 @@ def _fill(event: E) -> None:
         suggestion = b.suggestion
 
         if suggestion:
-            t = re.split(r"(\S+\s+)", suggestion.text)
+            t = re.split(r"([^\s/]+(?:\s+|/))", suggestion.text)
             b.insert_text(next(x for x in t if x))
 
     return key_bindings