diff --git a/src/rt/rust_shape.cpp b/src/rt/rust_shape.cpp
index 6f1082d4aa8e..326e4e2a5140 100644
--- a/src/rt/rust_shape.cpp
+++ b/src/rt/rust_shape.cpp
@@ -289,7 +289,7 @@ private:
     }
 
     inline void cmp_two_pointers() {
-        ALIGN_TO(alignof<void *>() * 2);
+        ALIGN_TO(alignof<void *>());
         data_pair<uint8_t *> fst = bump_dp<uint8_t *>(dp);
         data_pair<uint8_t *> snd = bump_dp<uint8_t *>(dp);
         cmp_number(fst);