diff --git a/src/payments/p2pk.js b/src/payments/p2pk.js
index 5f65030..4073d52 100644
--- a/src/payments/p2pk.js
+++ b/src/payments/p2pk.js
@@ -65,7 +65,7 @@ function p2pk (a, opts) {
     }
 
     if (a.signature) {
-      if (a.input && !a.input.equals(o.input)) throw new TypeError('Input mismatch')
+      if (a.input && !a.input.equals(o.input)) throw new TypeError('Signature mismatch')
     }
 
     if (a.input) {
diff --git a/test/fixtures/p2pk.json b/test/fixtures/p2pk.json
index 7ede5f4..a07c5b8 100644
--- a/test/fixtures/p2pk.json
+++ b/test/fixtures/p2pk.json
@@ -116,6 +116,19 @@
         "pubkey": "030000000000000000000000000000000000000000000000000000000000000001",
         "input": "ffffffffffffffff"
       }
+    },
+    {
+      "exception": "Input has invalid signature",
+      "arguments": {
+        "input": "30060201ff0201ff01"
+      }
+    },
+    {
+      "exception": "Signature mismatch",
+      "arguments": {
+        "signature": "300602010002010001",
+        "input": "300602010302010301"
+      }
     }
   ],
   "dynamic": {
diff --git a/test/fixtures/p2pkh.json b/test/fixtures/p2pkh.json
index d16b181..118111d 100644
--- a/test/fixtures/p2pkh.json
+++ b/test/fixtures/p2pkh.json
@@ -204,6 +204,13 @@
         "hash": "ffffffffffffffffffffffffffffffffffffffff",
         "input": "300602010002010001 030000000000000000000000000000000000000000000000000000000000000001"
       }
+    },
+    {
+      "exception": "Signature mismatch",
+      "arguments": {
+        "signature": "300602010002010001",
+        "input": "300602010302010301 030000000000000000000000000000000000000000000000000000000000000001"
+      }
     }
   ],
   "dynamic": {