diff --git a/rskj-core/src/main/java/org/ethereum/config/Constants.java b/rskj-core/src/main/java/org/ethereum/config/Constants.java
index 984c335d53d..a15186f4f8d 100644
--- a/rskj-core/src/main/java/org/ethereum/config/Constants.java
+++ b/rskj-core/src/main/java/org/ethereum/config/Constants.java
@@ -48,6 +48,9 @@ public class Constants {
 
     private static final long DEFAULT_MAX_TIMESTAMPS_DIFF_IN_SECS = 5L * 60;  // 5 mins
     private static final long TESTNET_MAX_TIMESTAMPS_DIFF_IN_SECS = 120L * 60; // 120 mins
+    private static final int MAX_CONTRACT_SIZE = 0x6000;
+    private static final int MAX_INITCODE_SIZE = 2 * MAX_CONTRACT_SIZE;
+
 
     private final byte chainId;
     private final boolean seedCowAccounts;
@@ -214,7 +217,11 @@ public static BigInteger getTransactionGasCap() {
     }
 
     public static int getMaxContractSize() {
-        return 0x6000;
+        return MAX_CONTRACT_SIZE;
+    }
+
+    public static int getMaxInitCodeSize() {
+        return MAX_INITCODE_SIZE;
     }
 
     public static int getMaxAddressByteLength() {
diff --git a/rskj-core/src/main/java/org/ethereum/config/blockchain/upgrades/ConsensusRule.java b/rskj-core/src/main/java/org/ethereum/config/blockchain/upgrades/ConsensusRule.java
index 72b787537ea..36ae79b5ebf 100644
--- a/rskj-core/src/main/java/org/ethereum/config/blockchain/upgrades/ConsensusRule.java
+++ b/rskj-core/src/main/java/org/ethereum/config/blockchain/upgrades/ConsensusRule.java
@@ -94,7 +94,8 @@ public enum ConsensusRule {
     RSKIP415("rskip415"),
     RSKIP417("rskip417"),
     RSKIP428("rskip428"),
-    RSKIP434("rskip434")
+    RSKIP434("rskip434"),
+    RSKIP438("rskip438")
     ;
 
     private String configKey;
diff --git a/rskj-core/src/main/resources/expected.conf b/rskj-core/src/main/resources/expected.conf
index 5b440a1367e..8596343733f 100644
--- a/rskj-core/src/main/resources/expected.conf
+++ b/rskj-core/src/main/resources/expected.conf
@@ -96,7 +96,8 @@ blockchain = {
              rskip417 = <hardforkName>
              rskip428 = <hardforkName>
              rskip434 = <hardforkName>
-         }
+             rskip438 = <hardforkName>
+        }
     }
     gc = {
         enabled = <enabled>
diff --git a/rskj-core/src/main/resources/reference.conf b/rskj-core/src/main/resources/reference.conf
index 8228aa620d1..62b99aee98e 100644
--- a/rskj-core/src/main/resources/reference.conf
+++ b/rskj-core/src/main/resources/reference.conf
@@ -81,6 +81,7 @@ blockchain = {
             rskip417 = arrowhead600
             rskip428 = lovell700
             rskip434 = arrowhead631
+            rskip438 = lovell700
         }
     }
     gc = {
diff --git a/rskj-core/src/test/java/org/ethereum/config/ConstantsTest.java b/rskj-core/src/test/java/org/ethereum/config/ConstantsTest.java
index 50b46d84520..db56f1b260e 100644
--- a/rskj-core/src/test/java/org/ethereum/config/ConstantsTest.java
+++ b/rskj-core/src/test/java/org/ethereum/config/ConstantsTest.java
@@ -81,4 +81,14 @@ void rskip297ActivationTest() {
         assertEquals(300, Constants.testnet(activationConfig).getMaxTimestampsDiffInSecs(preRskip297Config));
         assertEquals(7200, Constants.testnet(activationConfig).getMaxTimestampsDiffInSecs(postRskip297Config));
     }
+
+    @Test
+    void maxInitcodeSizeTest() {
+        //given
+        int maxInitCodeSizeExpected = 49152;
+        //when
+        int maxInitCodeSize = Constants.getMaxInitCodeSize();
+        //then
+        assertEquals(maxInitCodeSizeExpected, maxInitCodeSize);
+    }
 }
diff --git a/rskj-core/src/test/java/org/ethereum/config/blockchain/upgrades/ActivationConfigTest.java b/rskj-core/src/test/java/org/ethereum/config/blockchain/upgrades/ActivationConfigTest.java
index 0593855f481..cff14eb6cef 100644
--- a/rskj-core/src/test/java/org/ethereum/config/blockchain/upgrades/ActivationConfigTest.java
+++ b/rskj-core/src/test/java/org/ethereum/config/blockchain/upgrades/ActivationConfigTest.java
@@ -123,6 +123,7 @@ class ActivationConfigTest {
             "    rskip417: arrowhead600",
             "    rskip434: arrowhead631",
             "    rskip428: lovell700",
+            "    rskip438: lovell700",
             "}"
     ));