diff --git a/jOOQ/src/main/java/org/jooq/impl/DefaultDataType.java b/jOOQ/src/main/java/org/jooq/impl/DefaultDataType.java
index c61fd09e73..5a4aacab0f 100644
--- a/jOOQ/src/main/java/org/jooq/impl/DefaultDataType.java
+++ b/jOOQ/src/main/java/org/jooq/impl/DefaultDataType.java
@@ -66,6 +66,10 @@ import org.jooq.UDTRecord;
 import org.jooq.exception.SQLDialectNotSupportedException;
 import org.jooq.tools.Convert;
 import org.jooq.types.Interval;
+import org.jooq.types.UByte;
+import org.jooq.types.UInteger;
+import org.jooq.types.ULong;
+import org.jooq.types.UShort;
 
 /**
  * A common base class for data types.
@@ -229,6 +233,22 @@ public class DefaultDataType<T> implements DataType<T> {
         this.castTypeName = castTypeName;
         this.castTypeBase = TYPE_NAME_PATTERN.matcher(castTypeName).replaceAll("").trim();
         this.arrayType = (Class<T[]>) Array.newInstance(type, 0).getClass();
+
+        if (precision == 0) {
+            if (type == Long.class || type == ULong.class) {
+                precision = LONG_PRECISION;
+            }
+            else if (type == Integer.class  || type == UInteger.class) {
+                precision = INTEGER_PRECISION;
+            }
+            else if (type == Short.class || type == UShort.class) {
+                precision = SHORT_PRECISION;
+            }
+            else if (type == Byte.class || type == UByte.class) {
+                precision = BYTE_PRECISION;
+            }
+        }
+
         this.precision = precision;
         this.scale = scale;
         this.length = length;