diff --git a/jOOQ-meta/src/main/java/org/jooq/util/firebird/FirebirdTableDefinition.java b/jOOQ-meta/src/main/java/org/jooq/util/firebird/FirebirdTableDefinition.java
index c5deefe46b..e5415e2092 100644
--- a/jOOQ-meta/src/main/java/org/jooq/util/firebird/FirebirdTableDefinition.java
+++ b/jOOQ-meta/src/main/java/org/jooq/util/firebird/FirebirdTableDefinition.java
@@ -82,7 +82,12 @@ public class FirebirdTableDefinition extends AbstractTableDefinition {
                 r.RDB$NULL_FLAG.nvl((short) 0),
                 r.RDB$DEFAULT_SOURCE,
                 r.RDB$FIELD_POSITION,
-                f.RDB$FIELD_LENGTH,
+
+                // [#3342] FIELD_LENGTH should be ignored for LOBs
+                decode().value(f.RDB$FIELD_TYPE)
+                        .when((short) 261, (short) 0)
+                        .otherwise(f.RDB$FIELD_LENGTH)
+                        .as("FIELD_LENGTH"),
                 f.RDB$FIELD_PRECISION,
                 f.RDB$FIELD_SCALE.neg().as("FIELD_SCALE"),
 
@@ -132,7 +137,7 @@ public class FirebirdTableDefinition extends AbstractTableDefinition {
                     getDatabase(),
                     getSchema(),
                     record.getValue("FIELD_TYPE", String.class),
-                    record.getValue(f.RDB$FIELD_LENGTH),
+                    record.getValue("FIELD_LENGTH", short.class),
                     record.getValue(f.RDB$FIELD_PRECISION),
                     record.getValue("FIELD_SCALE", Integer.class),
                     record.getValue(r.RDB$NULL_FLAG.nvl((short) 0)) == 0,
diff --git a/jOOQ-test/src/main/resources/org/jooq/test/firebird/create.sql b/jOOQ-test/src/main/resources/org/jooq/test/firebird/create.sql
index 8c34f2704e..e179c05125 100644
--- a/jOOQ-test/src/main/resources/org/jooq/test/firebird/create.sql
+++ b/jOOQ-test/src/main/resources/org/jooq/test/firebird/create.sql
@@ -36,6 +36,7 @@ DROP TABLE "t_941"/
 DROP TABLE T_943/
 DROP TABLE t_unsigned/
 DROP TABLE t_booleans/
+DROP TABLE t_3342/
 
 
 
@@ -289,6 +290,11 @@ CREATE TABLE x_test_case_2025 (
 );
 /
 
+CREATE TABLE t_3342 (
+  b BLOB SUB_TYPE 1 SEGMENT SIZE 80 CHARACTER SET NONE COLLATE NONE
+);
+/
+
 CREATE VIEW V_LIBRARY (AUTHOR, TITLE) AS
 SELECT T_AUTHOR.FIRST_NAME || ' ' || T_AUTHOR.LAST_NAME, T_BOOK.TITLE
 FROM T_AUTHOR JOIN T_BOOK ON T_BOOK.AUTHOR_ID = T_AUTHOR.ID;