diff --git a/packages/types-codec/src/abstract/Array.ts b/packages/types-codec/src/abstract/Array.ts
index 551117168c41..ebeeba9afaee 100644
--- a/packages/types-codec/src/abstract/Array.ts
+++ b/packages/types-codec/src/abstract/Array.ts
@@ -153,12 +153,12 @@ export abstract class AbstractArray<T extends Codec> extends Array<T> implements
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public toPrimitive (): AnyJson {
+  public toPrimitive (disableAscii?: boolean): AnyJson {
     const count = this.length;
     const result = new Array<AnyJson>(count);
 
     for (let i = 0; i < count; i++) {
-      result[i] = this[i] && this[i].toPrimitive();
+      result[i] = this[i] && this[i].toPrimitive(disableAscii);
     }
 
     return result;
diff --git a/packages/types-codec/src/abstract/Base.ts b/packages/types-codec/src/abstract/Base.ts
index c92c6b1ecc96..1a54b5809c5c 100644
--- a/packages/types-codec/src/abstract/Base.ts
+++ b/packages/types-codec/src/abstract/Base.ts
@@ -89,8 +89,8 @@ export abstract class AbstractBase<T extends Codec> implements Codec {
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public toPrimitive (): AnyJson {
-    return this.#raw.toPrimitive();
+  public toPrimitive (disableAscii?: boolean): AnyJson {
+    return this.#raw.toPrimitive(disableAscii);
   }
 
   /**
diff --git a/packages/types-codec/src/abstract/Object.ts b/packages/types-codec/src/abstract/Object.ts
index 74a3b66f3763..7ab48145e6dc 100644
--- a/packages/types-codec/src/abstract/Object.ts
+++ b/packages/types-codec/src/abstract/Object.ts
@@ -70,7 +70,7 @@ export abstract class AbstractObject<T extends ToString> implements CodecObject<
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public abstract toPrimitive (): AnyJson;
+  public abstract toPrimitive (disableAscii?: boolean): AnyJson;
 
   /**
    * @description Returns the string representation of the value
diff --git a/packages/types-codec/src/base/Compact.ts b/packages/types-codec/src/base/Compact.ts
index 065a82f57bfd..e8ae40b5525c 100644
--- a/packages/types-codec/src/base/Compact.ts
+++ b/packages/types-codec/src/base/Compact.ts
@@ -164,8 +164,8 @@ export class Compact<T extends INumber> implements ICompact<T> {
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public toPrimitive (): string | number {
-    return this.#raw.toPrimitive();
+  public toPrimitive (disableAscii?: boolean): string | number {
+    return this.#raw.toPrimitive(disableAscii);
   }
 
   /**
diff --git a/packages/types-codec/src/base/Enum.ts b/packages/types-codec/src/base/Enum.ts
index 8f8ef87ff349..53c112444445 100644
--- a/packages/types-codec/src/base/Enum.ts
+++ b/packages/types-codec/src/base/Enum.ts
@@ -399,10 +399,10 @@ export class Enum implements IEnum {
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public toPrimitive (): AnyJson {
+  public toPrimitive (disableAscii?: boolean): AnyJson {
     return this.#isBasic
       ? this.type
-      : { [stringCamelCase(this.type)]: this.#raw.toPrimitive() };
+      : { [stringCamelCase(this.type)]: this.#raw.toPrimitive(disableAscii) };
   }
 
   /**
diff --git a/packages/types-codec/src/base/Option.ts b/packages/types-codec/src/base/Option.ts
index 5482fe502b56..fc270d578374 100644
--- a/packages/types-codec/src/base/Option.ts
+++ b/packages/types-codec/src/base/Option.ts
@@ -199,10 +199,10 @@ export class Option<T extends Codec> implements IOption<T> {
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public toPrimitive (): AnyJson {
+  public toPrimitive (disableAscii?: boolean): AnyJson {
     return this.isNone
       ? null
-      : this.#raw.toPrimitive();
+      : this.#raw.toPrimitive(disableAscii);
   }
 
   /**
diff --git a/packages/types-codec/src/extended/BTreeSet.ts b/packages/types-codec/src/extended/BTreeSet.ts
index a2e0fec77f31..41bc60b2e5c6 100644
--- a/packages/types-codec/src/extended/BTreeSet.ts
+++ b/packages/types-codec/src/extended/BTreeSet.ts
@@ -196,11 +196,11 @@ export class BTreeSet<V extends Codec = Codec> extends Set<V> implements ISet<V>
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public toPrimitive (): AnyJson {
+  public toPrimitive (disableAscii?: boolean): AnyJson {
     const json: AnyJson = [];
 
     for (const v of this.values()) {
-      json.push(v.toPrimitive());
+      json.push(v.toPrimitive(disableAscii));
     }
 
     return json;
diff --git a/packages/types-codec/src/extended/WrapperKeepOpaque.ts b/packages/types-codec/src/extended/WrapperKeepOpaque.ts
index e15073df07c9..24c7991963b0 100644
--- a/packages/types-codec/src/extended/WrapperKeepOpaque.ts
+++ b/packages/types-codec/src/extended/WrapperKeepOpaque.ts
@@ -87,16 +87,16 @@ export class WrapperKeepOpaque<T extends Codec> extends Bytes {
   public override toHuman (isExtended?: boolean, disableAscii?: boolean): AnyJson {
     return this.#decoded
       ? this.#decoded.toHuman(isExtended, disableAscii)
-      : super.toHuman();
+      : super.toHuman(isExtended, disableAscii);
   }
 
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public override toPrimitive (): any {
+  public override toPrimitive (disableAscii?: boolean): any {
     return this.#decoded
-      ? this.#decoded.toPrimitive()
-      : super.toPrimitive();
+      ? this.#decoded.toPrimitive(disableAscii)
+      : super.toPrimitive(disableAscii);
   }
 
   /**
diff --git a/packages/types-codec/src/native/Json.ts b/packages/types-codec/src/native/Json.ts
index 93a72b7fbb3b..362d81d7c162 100644
--- a/packages/types-codec/src/native/Json.ts
+++ b/packages/types-codec/src/native/Json.ts
@@ -114,10 +114,10 @@ export class Json extends Map<string, any> implements Codec {
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public toPrimitive (): Record<string, AnyJson> {
+  public toPrimitive (disableAscii?: boolean): Record<string, AnyJson> {
     return [...this.entries()].reduce<Record<string, AnyJson>>((json, [key, value]): Record<string, AnyJson> => {
       json[key] = isFunction((value as Codec).toPrimitive)
-        ? (value as Codec).toPrimitive()
+        ? (value as Codec).toPrimitive(disableAscii)
         : value as AnyJson;
 
       return json;
diff --git a/packages/types-codec/src/native/Struct.ts b/packages/types-codec/src/native/Struct.ts
index 82e472d165ae..1089c21e4685 100644
--- a/packages/types-codec/src/native/Struct.ts
+++ b/packages/types-codec/src/native/Struct.ts
@@ -296,11 +296,11 @@ export class Struct<
   /**
    * @description Converts the value in a best-fit primitive form
    */
-  public toPrimitive (): Record<string, AnyJson> {
+  public toPrimitive (disableAscii?: boolean): Record<string, AnyJson> {
     const json: Record<string, AnyJson> = {};
 
     for (const [k, v] of this.entries()) {
-      json[k as string] = v.toPrimitive();
+      json[k as string] = v.toPrimitive(disableAscii);
     }
 
     return json;
diff --git a/packages/types-codec/src/types/interfaces.ts b/packages/types-codec/src/types/interfaces.ts
index 9f0760778241..2a11bf53d7a2 100644
--- a/packages/types-codec/src/types/interfaces.ts
+++ b/packages/types-codec/src/types/interfaces.ts
@@ -31,7 +31,7 @@ export interface INumber extends Codec {
   toBigInt (): bigint;
   toBn (): BN;
   toNumber (): number;
-  toPrimitive (): string | number;
+  toPrimitive (disableAscii?: boolean): string | number;
 }
 
 export interface IFloat extends Codec {
@@ -78,7 +78,7 @@ export interface IU8a extends Uint8Array, Codec {
   readonly isUtf8: boolean
 
   bitLength (): number;
-  toHuman (isExtended?: boolean): any;
+  toHuman (isExtended?: boolean, disableAscii?: boolean): any;
   toJSON (): any;
   toUtf8 (): string;
 }