diff --git a/lib/std/target.zig b/lib/std/target.zig
index 49a7bd1c7dd1334067ed3b867f5ada7b99538355..ca29945e35d014ebbbbe0eea8ae8829b81d3f5d2 100644
--- a/lib/std/target.zig
+++ b/lib/std/target.zig
@@ -626,7 +626,7 @@ pub const Target = struct {
                 .raw => ".bin",
                 .plan9 => plan9Ext(cpu_arch),
                 .nvptx => ".ptx",
-                .dxcontainer => @panic("TODO what's the extension for these?"),
+                .dxcontainer => ".dxil",
             };
         }