diff --git a/src/arch/wasm/CodeGen.zig b/src/arch/wasm/CodeGen.zig
index 2d0ee2fc69..3b5e92fdbb 100644
--- a/src/arch/wasm/CodeGen.zig
+++ b/src/arch/wasm/CodeGen.zig
@@ -2604,6 +2604,7 @@ fn binOpBigInt(func: *CodeGen, lhs: WValue, rhs: WValue, ty: Type, op: Op) Inner
     switch (op) {
         .mul => return func.callIntrinsic("__multi3", &.{ ty, ty }, ty, &.{ lhs, rhs }),
         .shr => return func.callIntrinsic("__lshrti3", &.{ ty, Type.i32 }, ty, &.{ lhs, rhs }),
+        .shl => return func.callIntrinsic("__ashlti3", &.{ ty, Type.i32 }, ty, &.{ lhs, rhs }),
         .xor => {
             const result = try func.allocStack(ty);
             try func.emitWValue(result);
diff --git a/test/behavior/int128.zig b/test/behavior/int128.zig
index c4ace7c4c0..cdf32f02c2 100644
--- a/test/behavior/int128.zig
+++ b/test/behavior/int128.zig
@@ -87,7 +87,6 @@ test "truncate int128" {
 }
 
 test "shift int128" {
-    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO