diff --git a/build/moz.configure/toolchain.configure b/build/moz.configure/toolchain.configure
index c443705c26bf..bb7e98b65980 100644
--- a/build/moz.configure/toolchain.configure
+++ b/build/moz.configure/toolchain.configure
@@ -1112,7 +1112,7 @@ def compiler_wrapper(wrapper, ccache):
 
 @dependable
 def wasm():
-    return split_triplet("wasm32-wasi", allow_wasi=True)
+    return split_triplet("wasm32-wasip1", allow_wasi=True)
 
 
 @template