diff --git a/vm/src/stdlib/sys.rs b/vm/src/stdlib/sys.rs
index f72f496a1b..86d6f44fcd 100644
--- a/vm/src/stdlib/sys.rs
+++ b/vm/src/stdlib/sys.rs
@@ -60,6 +60,8 @@ mod sys {
                 "darwin"
             } else if #[cfg(windows)] {
                 "win32"
+            } else if #[cfg(target_os = "wasi")] {
+                "wasi"
             } else {
                 "unknown"
             }