diff --git a/Cargo.lock b/Cargo.lock
index 09099a1f9e6..da3eb41a8c3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1623,6 +1623,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "impls"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbc2ceeb474920e0d451e95df08409ac01a207851b564ba9dafcdb07a34fa6de"
+
 [[package]]
 name = "indenter"
 version = "0.3.3"
@@ -1986,7 +1992,9 @@ name = "iroha_schema"
 version = "2.0.0-pre-rc.4"
 dependencies = [
  "fixnum",
+ "impls",
  "iroha_schema_derive",
+ "iroha_schema_gen",
  "parity-scale-codec",
  "serde",
 ]
diff --git a/schema/Cargo.toml b/schema/Cargo.toml
index ed6abc8df5d..5014aaa1a76 100644
--- a/schema/Cargo.toml
+++ b/schema/Cargo.toml
@@ -12,3 +12,6 @@ fixnum = { version = "0.6.1", default-features = false, features = ["i64"] }
 
 [dev-dependencies]
 parity-scale-codec = { version = "2.3.1", default-features = false, features = ["derive", "full"] }
+impls = { version = "=1.0.0" }
+
+iroha_schema_gen = { version = "=2.0.0-pre-rc.4", path = "gen" }
\ No newline at end of file
diff --git a/schema/tests/architecture-dependent.rs b/schema/tests/architecture-dependent.rs
new file mode 100644
index 00000000000..c3d70ce9110
--- /dev/null
+++ b/schema/tests/architecture-dependent.rs
@@ -0,0 +1,24 @@
+use impls::impls;
+use iroha_schema::IntoSchema;
+use parity_scale_codec::{Decode, Encode};
+
+#[test]
+fn usize_isize_not_into_schema() {
+    // The architecture-dependent
+    assert!(!impls!(usize: IntoSchema));
+    assert!(!impls!(isize: IntoSchema));
+
+    // use serde::Serialize;
+    //
+    // assert!(!impls!(usize: Serialize));
+    // `usize` should be `Serialize`.
+
+    // But not `Encode`/`Decode`.
+    assert!(!impls!(usize: Encode | Decode));
+    assert!(!impls!(isize: Encode | Decode));
+
+    // There are no other primitive architecture-dependent types, so
+    // as long as `IntoSchema` requires all variants and all fields to
+    // also be `IntoSchema`, we are guaranteed that all schema types
+    // are safe to exchange.
+}