diff --git a/lib/bcoin/script.js b/lib/bcoin/script.js
index 95820ce7..f3aeb9c4 100644
--- a/lib/bcoin/script.js
+++ b/lib/bcoin/script.js
@@ -791,7 +791,7 @@ script.execute = function execute(data, stack, tx, index, flags, recurse) {
         if (flags.strictder !== false) {
           if (!script.isValidSignature(sig))
             return false;
-          if (!script.isLowDER(sig))
+          if (!script.isLowDER(sig.slice(0, -1)))
             return false;
         }
 
@@ -862,7 +862,7 @@ script.execute = function execute(data, stack, tx, index, flags, recurse) {
           if (flags.strictder !== false) {
             if (!script.isValidSignature(sig))
               return false;
-            if (!script.isLowDER(sig))
+            if (!script.isLowDER(sig.slice(0, -1)))
               return false;
           }
 
@@ -1853,15 +1853,11 @@ script.isValidSignature = function isValidSignature(sig, allowZero) {
   return true;
 };
 
-script.isLowDER = function isLowDER(sig, type) {
+script.isLowDER = function isLowDER(sig) {
   var half = bcoin.ecdsa.n.ushrn(1);
 
   if (!sig.s) {
     assert(utils.isBuffer(sig));
-
-    if (sig[sig.length - 1] === type)
-      sig = sig.slice(0, -1);
-
     try {
       sig = new bcoin.signature(sig);
     } catch (e) {