diff --git a/mkosi/__init__.py b/mkosi/__init__.py
index 819624269..bfed8d520 100644
--- a/mkosi/__init__.py
+++ b/mkosi/__init__.py
@@ -1877,7 +1877,7 @@ def create_parser() -> ArgumentParserMkosi:
     group.add_argument(
         "--qemu-mem",
         metavar="MEM",
-        default="1G",
+        default="2G",
         help="Configure guest's RAM size",
     )
     group.add_argument(