diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/path.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/path.rs
index 19c7ce0ce042b..55e738b58bd00 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/path.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/path.rs
@@ -27,7 +27,7 @@ pub enum Path {
 }
 
 // This type is being used a lot, make sure it doesn't grow unintentionally.
-#[cfg(target_arch = "x86_64")]
+#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
 const _: () = {
     assert!(size_of::<Path>() == 24);
     assert!(size_of::<Option<Path>>() == 24);
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/hir/type_ref.rs b/src/tools/rust-analyzer/crates/hir-def/src/hir/type_ref.rs
index eacc3f3cedfed..da0f058a9cb5c 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/hir/type_ref.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/hir/type_ref.rs
@@ -148,7 +148,7 @@ pub enum TypeRef {
     Error,
 }
 
-#[cfg(target_arch = "x86_64")]
+#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
 const _: () = assert!(size_of::<TypeRef>() == 24);
 
 pub type TypeRefId = Idx<TypeRef>;