diff --git a/pygments/lexers/asm.py b/pygments/lexers/asm.py
index 6087d6ed27..aa24f00b4c 100644
--- a/pygments/lexers/asm.py
+++ b/pygments/lexers/asm.py
@@ -95,7 +95,7 @@ class GasLexer(RegexLexer):
             (r'/[*][\w\W]*?[*]/', Comment.Multiline)
         ],
         'punctuation': [
-            (r'[-*,.()\[\]!:]+', Punctuation)
+            (r'[-*,.()\[\]!:{}]+', Punctuation)
         ]
     }