diff --git a/plugin/UltiSnips/__init__.py b/plugin/UltiSnips/__init__.py
index 66e5e3d..68f8a86 100644
--- a/plugin/UltiSnips/__init__.py
+++ b/plugin/UltiSnips/__init__.py
@@ -719,7 +719,7 @@ class SnippetManager(object):
         before, after = self._get_before_after()
         snip = Snippet(trigger, value, descr, options, globals)
 
-        if snip.matches(before):
+        if not trigger or snip.matches(before):
             self._do_snippet(snip, before, after)
             return True
         else:
diff --git a/test.py b/test.py
index 803d3a8..84df059 100755
--- a/test.py
+++ b/test.py
@@ -2008,6 +2008,11 @@ class Anon_NoTrigger_Simple(_AnonBase):
     keys = "abc" + EA
     wanted = "abcsimple expand"
 
+class Anon_NoTrigger_AfterSpace(_AnonBase):
+    args = '"simple expand"'
+    keys = "abc " + EA
+    wanted = "abc simple expand"
+
 class Anon_NoTrigger_Multi(_AnonBase):
     args = '"simple $1 expand $1 $0"'
     keys = "abc" + EA + "123" + JF + "456"