diff --git a/jOOQ-codegen/src/main/java/org/jooq/codegen/JavaGenerator.java b/jOOQ-codegen/src/main/java/org/jooq/codegen/JavaGenerator.java
index 1680e0f15b..457e0a33ef 100644
--- a/jOOQ-codegen/src/main/java/org/jooq/codegen/JavaGenerator.java
+++ b/jOOQ-codegen/src/main/java/org/jooq/codegen/JavaGenerator.java
@@ -10868,7 +10868,7 @@ public class JavaGenerator extends AbstractGenerator {
 
                 sb.append(out.ref(DefaultDataType.class));
                 sb.append(".getDefaultDataType(\"");
-                sb.append(escapeString(u != null ? u.toString() : t));
+                sb.append(escapeString(u != null && !u.empty() ? u.toString() : t));
                 sb.append("\")");
             }