diff --git a/lib/opFns.js b/lib/opFns.js
index 46eb91315e..993cfadd59 100644
--- a/lib/opFns.js
+++ b/lib/opFns.js
@@ -122,19 +122,19 @@ module.exports = {
   },
   // 0x10 range - bit ops
   LT: function (a, b, runState) {
-    return new BN(a.cmp(b) === -1 ? 1 : 0)
+    return new BN(a.lt(b) ? 1 : 0)
   },
   GT: function (a, b, runState) {
-    return new BN(a.cmp(b) === 1 ? 1 : 0)
+    return new BN(a.gt(b) ? 1 : 0)
   },
   SLT: function (a, b, runState) {
-    return new BN(a.fromTwos(256).cmp(b.fromTwos(256)) === -1 ? 1 : 0)
+    return new BN(a.fromTwos(256).lt(b.fromTwos(256)) ? 1 : 0)
   },
   SGT: function (a, b, runState) {
-    return new BN(a.fromTwos(256).cmp(b.fromTwos(256)) === 1 ? 1 : 0)
+    return new BN(a.fromTwos(256).gt(b.fromTwos(256)) ? 1 : 0)
   },
   EQ: function (a, b, runState) {
-    return new BN(a.cmp(b) === 0 ? 1 : 0)
+    return new BN(a.eq(b) ? 1 : 0)
   },
   ISZERO: function (a, runState) {
     return new BN(a.isZero() ? 1 : 0)
diff --git a/lib/precompiled/01-ecrecover.js b/lib/precompiled/01-ecrecover.js
index 93d11e0d2d..444c39ed15 100644
--- a/lib/precompiled/01-ecrecover.js
+++ b/lib/precompiled/01-ecrecover.js
@@ -11,7 +11,7 @@ module.exports = function (opts) {
 
   results.gasUsed = new BN(fees.ecrecoverGas.v)
 
-  if (opts.gasLimit.cmp(results.gasUsed) === -1) {
+  if (opts.gasLimit.lt(results.gasUsed)) {
     results.gasUsed = opts.gasLimit
     results.exception = 0 // 0 means VM fail (in this case because of OOG)
     results.exceptionError = error.OUT_OF_GAS
diff --git a/lib/precompiled/02-sha256.js b/lib/precompiled/02-sha256.js
index 8980aae055..ac060f93c5 100644
--- a/lib/precompiled/02-sha256.js
+++ b/lib/precompiled/02-sha256.js
@@ -13,7 +13,7 @@ module.exports = function (opts) {
   results.gasUsed = new BN(fees.sha256Gas.v)
   results.gasUsed.iadd(new BN(fees.sha256WordGas.v).imuln(Math.ceil(data.length / 32)))
 
-  if (opts.gasLimit.cmp(results.gasUsed) === -1) {
+  if (opts.gasLimit.lt(results.gasUsed)) {
     results.gasUsed = opts.gasLimit
     results.exceptionError = error.OUT_OF_GAS
     results.exception = 0 // 0 means VM fail (in this case because of OOG)
diff --git a/lib/precompiled/03-ripemd160.js b/lib/precompiled/03-ripemd160.js
index 9093f272f5..03554cedf5 100644
--- a/lib/precompiled/03-ripemd160.js
+++ b/lib/precompiled/03-ripemd160.js
@@ -13,7 +13,7 @@ module.exports = function (opts) {
   results.gasUsed = new BN(fees.ripemd160Gas.v)
   results.gasUsed.iadd(new BN(fees.ripemd160WordGas.v).imuln(Math.ceil(data.length / 32)))
 
-  if (opts.gasLimit.cmp(results.gasUsed) === -1) {
+  if (opts.gasLimit.lt(results.gasUsed)) {
     results.gasUsed = opts.gasLimit
     results.exceptionError = error.OUT_OF_GAS
     results.exception = 0 // 0 means VM fail (in this case because of OOG)
diff --git a/lib/precompiled/04-identity.js b/lib/precompiled/04-identity.js
index 127b010cff..9328a48b93 100644
--- a/lib/precompiled/04-identity.js
+++ b/lib/precompiled/04-identity.js
@@ -13,7 +13,7 @@ module.exports = function (opts) {
   results.gasUsed = new BN(fees.identityGas.v)
   results.gasUsed.iadd(new BN(fees.identityWordGas.v).imuln(Math.ceil(data.length / 32)))
 
-  if (opts.gasLimit.cmp(results.gasUsed) === -1) {
+  if (opts.gasLimit.lt(results.gasUsed)) {
     results.gasUsed = opts.gasLimit
     results.exceptionError = error.OUT_OF_GAS
     results.exception = 0 // 0 means VM fail (in this case because of OOG)