diff --git a/src/codegen/loongarch.zig b/src/codegen/loongarch.zig
index 1f032a19d8322c6280bf7e45c8a595025a901488..7b32af1057769c1a675cb342da183976d9545b7f 100644
--- a/src/codegen/loongarch.zig
+++ b/src/codegen/loongarch.zig
@@ -26,6 +26,7 @@ pub fn legalizeFeatures(_: *const std.Target) ?*const Air.Legalize.Features {
         .soft_f32,
         .soft_f64,
         .soft_f80,
+        .soft_f128,
     });
 }