diff --git a/ethereumj-core/src/main/java/org/ethereum/util/ByteUtil.java b/ethereumj-core/src/main/java/org/ethereum/util/ByteUtil.java
index 6f1c16e5..4f582151 100644
--- a/ethereumj-core/src/main/java/org/ethereum/util/ByteUtil.java
+++ b/ethereumj-core/src/main/java/org/ethereum/util/ByteUtil.java
@@ -311,9 +311,9 @@ public class ByteUtil {
         if ( (data.length * 8) - 1 < pos )
             throw new Error("outside byte array limit, pos: " + pos);
 
-        int posByte  = (pos) / 8;
+        int posByte  = data.length - 1 - (pos) / 8;
         int posBit   = (pos) % 8;
-        byte setter  = (byte)(1 << (7 - posBit));
+        byte setter  = (byte)(1 << (posBit));
         byte toBeSet = data[posByte];
         byte result;
         if(val == 1)
@@ -330,9 +330,9 @@ public class ByteUtil {
         if ((data.length * 8) - 1 < pos )
             throw new Error("outside byte array limit, pos: " + pos);
 
-        int  posByte = pos / 8;
+        int  posByte = data.length - 1 - pos / 8;
         int  posBit = pos % 8;
         byte dataByte = data[posByte];
-        return Math.min(1, (dataByte & (1 << (7 - posBit))));
+        return Math.min(1, (dataByte & (1 << (posBit))));
     }
 }
\ No newline at end of file
diff --git a/ethereumj-core/src/test/java/test/ethereum/util/ByteUtilTest.java b/ethereumj-core/src/test/java/test/ethereum/util/ByteUtilTest.java
index c3fefeec..c6226944 100644
--- a/ethereumj-core/src/test/java/test/ethereum/util/ByteUtilTest.java
+++ b/ethereumj-core/src/test/java/test/ethereum/util/ByteUtilTest.java
@@ -246,20 +246,20 @@ public class ByteUtilTest {
 		 */
 		byte[] data = ByteBuffer.allocate(4).putInt(0).array();
 		int posBit = 24;
-		int expected = 128;
+		int expected = 16777216;
 		int result = -1;
 		byte[] ret = ByteUtil.setBit(data, posBit, 1);
 		result = ByteUtil.byteArrayToInt(ret);
 		assertTrue(expected == result);
 
 		posBit = 25;
-		expected = 192;
+		expected = 50331648;
 		ret = ByteUtil.setBit(data, posBit, 1);
 		result = ByteUtil.byteArrayToInt(ret);
 		assertTrue(expected == result);
 
 		posBit = 2;
-		expected = 536871104;
+		expected = 50331652;
 		ret = ByteUtil.setBit(data, posBit, 1);
 		result = ByteUtil.byteArrayToInt(ret);
 		assertTrue(expected == result);
@@ -268,13 +268,13 @@ public class ByteUtilTest {
 			Set off
 		 */
 		posBit = 24;
-		expected = 536870976;
+		expected = 33554436;
 		ret = ByteUtil.setBit(data, posBit, 0);
 		result = ByteUtil.byteArrayToInt(ret);
 		assertTrue(expected == result);
 
 		posBit = 25;
-		expected = 536870912;
+		expected = 4;
 		ret = ByteUtil.setBit(data, posBit, 0);
 		result = ByteUtil.byteArrayToInt(ret);
 		assertTrue(expected == result);