diff --git a/java_console/inifile/src/com/opensr5/ini/field/EnumIniField.java b/java_console/inifile/src/com/opensr5/ini/field/EnumIniField.java
index 1aa0f4d1f8..a13af85f6c 100644
--- a/java_console/inifile/src/com/opensr5/ini/field/EnumIniField.java
+++ b/java_console/inifile/src/com/opensr5/ini/field/EnumIniField.java
@@ -14,14 +14,15 @@ public class EnumIniField extends IniField {
     private final FieldType type;
     private final List<String> enums;
     private final int bitPosition;
-    private final int bitSize;
+    // weird format where 'one bit' width means 0 and "two bits" means "1"
+    private final int bitSize0;
 
-    public EnumIniField(String name, int offset, FieldType type, List<String> enums, int bitPosition, int bitSize) {
+    public EnumIniField(String name, int offset, FieldType type, List<String> enums, int bitPosition, int bitSize0) {
         super(name, offset);
         this.type = type;
         this.enums = enums;
         this.bitPosition = bitPosition;
-        this.bitSize = bitSize;
+        this.bitSize0 = bitSize0;
     }
 
     @Override
@@ -33,8 +34,8 @@ public class EnumIniField extends IniField {
         return bitPosition;
     }
 
-    public int getBitSize() {
-        return bitSize;
+    public int getBitSize0() {
+        return bitSize0;
     }
 
     public List<String> getEnums() {
@@ -48,7 +49,7 @@ public class EnumIniField extends IniField {
     @Override
     public String getValue(ConfigurationImage image) {
         int ordinal = getByteBuffer(image).getInt();
-        ordinal = getBitRange(ordinal, bitPosition, bitSize);
+        ordinal = getBitRange(ordinal, bitPosition, bitSize0 + 1);
 
         if (ordinal >= enums.size())
             throw new IllegalStateException(ordinal + " in " + getName());
@@ -72,7 +73,7 @@ public class EnumIniField extends IniField {
         if (ordinal == -1)
             throw new IllegalArgumentException("Not found " + v);
         int value = getByteBuffer(image).getInt();
-        value = setBitRange(value, ordinal, bitPosition, bitSize);
+        value = setBitRange(value, ordinal, bitPosition, bitSize0 + 1);
         getByteBuffer(image).putInt(value);
     }
 
@@ -84,23 +85,25 @@ public class EnumIniField extends IniField {
                 ", type=" + type +
                 ", enums=" + enums +
                 ", bitPosition=" + bitPosition +
-                ", bitSize=" + bitSize +
+                ", bitSize=" + bitSize0 +
                 '}';
     }
 
     public static int setBitRange(int value, int ordinal, int bitPosition, int bitSize) {
+        if (ordinal >= (1 << bitSize))
+            throw new IllegalArgumentException("Ordinal overflow " + ordinal + " does not fit in " + bitSize + " bit(s)");
         int num = ((1 << bitSize) - 1) << bitPosition;
         int clearBitRange = value & ~num;
-        return (byte) (clearBitRange + (ordinal << bitPosition));
+        return (clearBitRange + (ordinal << bitPosition));
     }
 
     public static boolean getBit(int ordinal, int bitPosition) {
-        return getBitRange(ordinal, bitPosition, 0) == 1;
+        return getBitRange(ordinal, bitPosition, 1) == 1;
     }
 
     public static int getBitRange(int ordinal, int bitPosition, int bitSize) {
         ordinal = ordinal >> bitPosition;
-        ordinal = ordinal & ((1 << (bitSize + 1)) - 1);
+        ordinal = ordinal & ((1 << (bitSize)) - 1);
         return ordinal;
     }
 
@@ -115,10 +118,10 @@ public class EnumIniField extends IniField {
         if (bitPositions.length != 2)
             throw new IllegalStateException("Bit position " + bitRange);
         int bitPosition = Integer.parseInt(bitPositions[0]);
-        int bitSize = Integer.parseInt(bitPositions[1]) - bitPosition;
+        int bitSize0 = Integer.parseInt(bitPositions[1]) - bitPosition;
 
         List<String> enums = list.subList(5, list.size());
 
-        return new EnumIniField(name, offset, type, enums, bitPosition, bitSize);
+        return new EnumIniField(name, offset, type, enums, bitPosition, bitSize0);
     }
 }
diff --git a/java_console/inifile/src/com/opensr5/ini/test/IniFileReaderTest.java b/java_console/inifile/src/com/opensr5/ini/test/IniFileReaderTest.java
index f8c71ee433..b0219d8e25 100644
--- a/java_console/inifile/src/com/opensr5/ini/test/IniFileReaderTest.java
+++ b/java_console/inifile/src/com/opensr5/ini/test/IniFileReaderTest.java
@@ -12,7 +12,6 @@ import org.junit.Test;
 import java.io.ByteArrayInputStream;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 
 /**
  * Andrey Belomutskiy, (c) 2013-2020
@@ -104,26 +103,28 @@ public class IniFileReaderTest {
 
     @Test
     public void testSetBits() {
-        assertEquals((byte) 0xFE, EnumIniField.setBitRange((byte) 0xFF, 0, 0, 1));
-        assertEquals((byte) 0xF0, EnumIniField.setBitRange((byte) 0xFF, 0, 0, 4));
-        assertEquals((byte) 0x0F, EnumIniField.setBitRange((byte) 0xFF, 0, 4, 4));
+        assertEquals(0xFE, EnumIniField.setBitRange(0xFF, 0, 0, 1));
+        assertEquals(0xF0, EnumIniField.setBitRange(0xFF, 0, 0, 4));
+        assertEquals(0x0F, EnumIniField.setBitRange(0xFF, 0, 4, 4));
 
-        assertEquals((byte)    1, EnumIniField.setBitRange((byte) 0xFF, 3, 0, 1));
-        assertEquals((byte)  -13, EnumIniField.setBitRange((byte) 0xFF, 3, 0, 4));
-        assertEquals((byte) 0x3F, EnumIniField.setBitRange((byte) 0xFF, 3, 4, 4));
+        assertEquals(0xff, EnumIniField.setBitRange(0xFF, 3, 0, 2));
+        assertEquals(0xF3, EnumIniField.setBitRange(0xFF, 3, 0, 4));
+        assertEquals(0x3F, EnumIniField.setBitRange(0xFF, 3, 4, 4));
+
+        assertEquals(0x400, EnumIniField.setBitRange(0, 1, 10, 1));
     }
 
     @Test
     public void testBitLogic() {
-        assertEquals(4, EnumIniField.getBitRange(4, 0, 7));
-        assertEquals(4, EnumIniField.getBitRange(4, 0, 2));
-        assertEquals(0, EnumIniField.getBitRange(4, 0, 1));
-        assertEquals(3, EnumIniField.getBitRange(7, 0, 1));
+        assertEquals(4, EnumIniField.getBitRange(4, 0, 8));
+        assertEquals(4, EnumIniField.getBitRange(4, 0, 3));
+        assertEquals(0, EnumIniField.getBitRange(4, 0, 2));
+        assertEquals(3, EnumIniField.getBitRange(7, 0, 2));
 
         assertEquals(true, EnumIniField.getBit(0xff, 0));
 
         assertEquals(true, EnumIniField.getBit(0xf0, 4));
-        assertEquals(2, EnumIniField.getBitRange(0xf0, 3, 1));
+        assertEquals(2, EnumIniField.getBitRange(0xf0, 3, 2));
     }
 
     @Test
@@ -138,7 +139,7 @@ public class IniFileReaderTest {
 
         EnumIniField field = (EnumIniField) model.allIniFields.get("name");
         assertEquals(3, field.getBitPosition());
-        assertEquals(2, field.getBitSize());
+        assertEquals(2, field.getBitSize0());
         assertEquals(2, field.getEnums().size());
     }