diff --git a/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java b/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java
index 1931f706b1..e7634261d5 100644
--- a/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java
+++ b/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java
@@ -279,6 +279,8 @@ final class DDLInterpreter {
 
             if (alterColumnNullability != null)
                 existingField.type = existingField.type.nullability(alterColumnNullability);
+            else if (alterColumnType != null)
+                existingField.type = alterColumnType;
             else
                 throw unsupportedQuery(query);
         }