diff --git a/specs/like-tip-memo.feature b/specs/like-tip-memo.feature
index 466ef65..40031f9 100644
--- a/specs/like-tip-memo.feature
+++ b/specs/like-tip-memo.feature
@@ -39,6 +39,7 @@ Feature: Like / Tip a Memo
 
     Examples:
       | tip |
+      | 600 |
       | 3000 |
       | 25000 |
 
@@ -64,7 +65,7 @@ Feature: Like / Tip a Memo
     Examples:
       | tip |
       | 1 |
-      | 2999 |
+      | 599 |
 
   Scenario: Like / Tip a Memo - 6 a tip above the maximum is rejected
     Given the wallet has a spendable balance of 150000000 sats
diff --git a/src/components/post-feed/like-tip-modal.js b/src/components/post-feed/like-tip-modal.js
index d6e4c5f..073463d 100644
--- a/src/components/post-feed/like-tip-modal.js
+++ b/src/components/post-feed/like-tip-modal.js
@@ -123,8 +123,12 @@ function LikeTipModal ({ show, post, wallet, profiles = {}, onHide, onSuccess })
               step='1'
               placeholder='0'
               value={tip}
-              onChange={(e) => setTip(e.target.value)}
-              disabled={submitting || !!error}
+              onChange={(e) => {
+                setTip(e.target.value)
+                // Clear a previous validation error so the user can retry.
+                setError('')
+              }}
+              disabled={submitting}
             />
           </Form.Group>
         </Form>
@@ -141,7 +145,7 @@ function LikeTipModal ({ show, post, wallet, profiles = {}, onHide, onSuccess })
         <Button
           variant='primary'
           onClick={handleSubmit}
-          disabled={submitting || !!error || !post || !wallet}
+          disabled={submitting || !post || !wallet}
         >
           {submitting ? 'Liking...' : 'Like'}
         </Button>
diff --git a/src/services/memo-like.js b/src/services/memo-like.js
index 038ccf2..cff2127 100644
--- a/src/services/memo-like.js
+++ b/src/services/memo-like.js
@@ -16,7 +16,8 @@
 
   Constants
     MEMO_LIKE_PREFIX  : hex prefix for the Memo "like" action (0x6d04)
-    DUST_LIMIT_SATS   : smallest non-dust BCH output (3000 sats)
+    DUST_LIMIT_SATS   : minimum wallet balance required to broadcast a like (3000 sats)
+    DUST_TIP_SATS     : smallest non-dust tip output (600 sats)
     MAX_TIP_SATS      : sanity maximum for a single tip (100000000 sats = 1 BCH)
     PARENT_TXID_BYTES : liked post txid size in bytes (32)
 */
@@ -26,6 +27,7 @@ const { hexToBytes } = require('./hex')
 
 const MEMO_LIKE_PREFIX = '6d04'
 const DUST_LIMIT_SATS = 3000
+const DUST_TIP_SATS = 600
 const MAX_TIP_SATS = 100000000
 const PARENT_TXID_BYTES = 32
 
@@ -43,6 +45,7 @@ class MemoLike extends MemoAction {
     super(deps)
     this.feed = deps.feed
     this.dustLimit = deps.dustLimit || DUST_LIMIT_SATS
+    this.dustTipSats = deps.dustTipSats || DUST_TIP_SATS
     this.maxTip = deps.maxTip || MAX_TIP_SATS
   }
 
@@ -81,8 +84,8 @@ class MemoLike extends MemoAction {
       throw err
     }
 
-    if (tipSats > 0 && tipSats < this.dustLimit) {
-      const err = new Error(`Tip is below the dust limit of ${this.dustLimit} sats.`)
+    if (tipSats > 0 && tipSats < this.dustTipSats) {
+      const err = new Error(`Tip is below the dust limit of ${this.dustTipSats} sats.`)
       err.code = 'like_dust'
       throw err
     }
@@ -189,6 +192,7 @@ class MemoLike extends MemoAction {
 
 MemoLike.MEMO_LIKE_PREFIX = MEMO_LIKE_PREFIX
 MemoLike.DUST_LIMIT_SATS = DUST_LIMIT_SATS
+MemoLike.DUST_TIP_SATS = DUST_TIP_SATS
 MemoLike.MAX_TIP_SATS = MAX_TIP_SATS
 
 module.exports = MemoLike
diff --git a/test/unit/like-tip-page.test.js b/test/unit/like-tip-page.test.js
index 39a033a..865ea7c 100644
--- a/test/unit/like-tip-page.test.js
+++ b/test/unit/like-tip-page.test.js
@@ -154,7 +154,7 @@ test('submitting with a non-numeric tip string is rejected', async () => {
 test('submitting with a dust tip is rejected', async () => {
   const { wallet, page } = build()
   page.open(POST_TXID, AUTHOR_ADDRESS)
-  page.setTip('2999')
+  page.setTip('599')
 
   const result = await page.submit()
 
diff --git a/test/unit/memo-like.test.js b/test/unit/memo-like.test.js
index 8030a0f..4667318 100644
--- a/test/unit/memo-like.test.js
+++ b/test/unit/memo-like.test.js
@@ -59,6 +59,10 @@ test('DUST_LIMIT_SATS is 3000', () => {
   assert.equal(MemoLike.DUST_LIMIT_SATS, 3000)
 })
 
+test('DUST_TIP_SATS is 600', () => {
+  assert.equal(MemoLike.DUST_TIP_SATS, 600)
+})
+
 test('MAX_TIP_SATS is 100000000', () => {
   assert.equal(MemoLike.MAX_TIP_SATS, 100000000)
 })
@@ -135,20 +139,23 @@ test('a negative tip is rejected with a validation error', async () => {
   await assertLikeRejected(fakeWallet(), -1, 'like_validation')
 })
 
-test('a tip below the dust limit is rejected with a dust error', async () => {
+test('a tip below the tip dust limit is rejected with a dust error', async () => {
   const wallet = fakeWallet({ utxos: [{ txid: 'u1', value: 100000 }] })
   await assertLikeRejected(wallet, 1, 'like_dust')
-  await assertLikeRejected(wallet, 2999, 'like_dust')
+  await assertLikeRejected(wallet, 599, 'like_dust')
 })
 
-test('a tip at the dust limit is accepted', async () => {
+test('a tip at the tip dust limit is accepted', async () => {
   const wallet = fakeWallet({ utxos: [{ txid: 'u1', value: 100000 }] })
   const memoLike = new MemoLike({ wallet })
 
-  const txid = await memoLike.like(POST_TXID, 3000, AUTHOR_ADDRESS)
+  const txid = await memoLike.like(POST_TXID, 600, AUTHOR_ADDRESS)
 
   assert.equal(txid, 'fake-txid')
   assert.equal(wallet.broadcasts.length, 1)
+  assert.deepEqual(wallet.broadcasts[0].bchOutput, [
+    { address: AUTHOR_ADDRESS, amountSat: 600 }
+  ])
 })
 
 test('a tip above the hard maximum is rejected with a maximum error', async () => {