diff --git a/include/xsimd/arch/xsimd_wasm.hpp b/include/xsimd/arch/xsimd_wasm.hpp
index 54cbdb170..78d838352 100644
--- a/include/xsimd/arch/xsimd_wasm.hpp
+++ b/include/xsimd/arch/xsimd_wasm.hpp
@@ -1276,11 +1276,11 @@ namespace xsimd
         {
             // shuffle within lane
             if (I0 < 2 && I1 >= 2)
-                return wasm_i64x2_shuffle(x, y, I0, I1);
+                return wasm_i64x2_shuffle(x, y, I1, I0);
 
             // shuffle within opposite lane
             if (I0 >= 2 && I1 < 2)
-                return wasm_i64x2_shuffle(y, x, I0, I1);
+                return wasm_i64x2_shuffle(y, x, I1, I0);
             return shuffle(x, y, mask, generic {});
         }