diff --git a/src/validation.ts b/src/validation.ts
index d3a9066..52e2bc4 100644
--- a/src/validation.ts
+++ b/src/validation.ts
@@ -17,7 +17,7 @@ const Prefixes = Object.freeze({
   SCRIPT: 'script',
 });
 
-type SUPPORTED_PAYMENT_CRED_PREFIX = 'addr_vkh' | 'addr_vk' | 'script';
+type PaymentCredPrefix = 'addr_vkh' | 'addr_vk' | 'script';
 
 const MAX_UNSIGNED_INT = 2_147_483_648;
 const MAX_SIGNED_INT = 2_147_483_647;
@@ -96,7 +96,7 @@ export const paymentCredFromBech32Address = (
 ):
   | {
       paymentCred: string;
-      prefix: SUPPORTED_PAYMENT_CRED_PREFIX;
+      prefix: PaymentCredPrefix;
     }
   | undefined => {
   // compute paymentCred
@@ -133,7 +133,7 @@ export const paymentCredFromBech32Address = (
 
 export const paymentCredToBech32Address = (
   input: string,
-  prefix: SUPPORTED_PAYMENT_CRED_PREFIX,
+  prefix: PaymentCredPrefix,
 ): string | undefined => {
   // Encodes payment credential into its original bech32 prefixed form
   try {
@@ -146,11 +146,6 @@ export const paymentCredToBech32Address = (
       case Prefixes.SCRIPT:
         // add prefix to payment cred and encode it as bech32
         return bech32.encode(prefix, words);
-      case Prefixes.PAYMENT_KEY:
-        // Payment key was already converted to key hash, so we cannot restore the original key.
-        // We could supply orig via a parameter and then compare its hash to the input, but that's too much trouble.
-        // Due to the above return payment key hash (input) with addr_vkh prefix instead of the original addr_vk
-        return bech32.encode(Prefixes.PAYMENT_KEY_HASH, words);
       default:
         throw Error(
           `Prefix ${prefix} is not supported by paymentCredToBech32Address`,
diff --git a/test/fixtures/cardano.ts b/test/fixtures/cardano.ts
index 89d1a90..b3f1f4c 100644
--- a/test/fixtures/cardano.ts
+++ b/test/fixtures/cardano.ts
@@ -21,6 +21,7 @@ export const getPaymentPartBech32 = [
   },
   {
     // https://cips.cardano.org/cips/cip19/#testvectors
+    // converted to PKH: addr_vkh1jjfnzhxe966a33psfenm0ct2udkkr569qf55v4uprgkgu8zsvmg
     description: 'addr_vk addr type 0',
     paymentCred:
       'addr_vk1w0l2sr2zgfm26ztc6nl9xy8ghsk5sh6ldwemlpmp9xylzy4dtf7st80zhd',
diff --git a/test/fixtures/validation.ts b/test/fixtures/validation.ts
index 7b12ecd..d8039c9 100644
--- a/test/fixtures/validation.ts
+++ b/test/fixtures/validation.ts
@@ -162,16 +162,6 @@ export const paymentCredToBech32Address = [
     prefix: 'script',
     result: 'script1cda3khwqv60360rp5m7akt50m6ttapacs8rqhn5w342z7r35m37',
   },
-  {
-    // TODO: With addr_vk prefix we assume payment key was already converted
-    // to the key hash, so we cannot restore the original key.
-    // Due to the above the function returns payment key hash (input) with addr_vkh prefix instead of the original addr_vk.
-    // Alternatively, we could just drop support for addr_vk.
-    description: 'Valid payment key from addr_vk gets converted to addr_vkh',
-    input: 'c37b1b5dc0669f1d3c61a6fddb2e8fde96be87b881c60bce8e8d542f',
-    prefix: 'addr_vk',
-    result: 'addr_vkh1cda3khwqv60360rp5m7akt50m6ttapacs8rqhn5w342z7lydx4l',
-  },
   {
     description: 'Valid script address',
     input: '59a38a122f5278190f6f34230b7376eb8bebabf92f87240d2271e012',