diff --git a/jOOQ/src/main/java/org/jooq/impl/InsertQueryImpl.java b/jOOQ/src/main/java/org/jooq/impl/InsertQueryImpl.java
index 1ac564b087..469c255726 100644
--- a/jOOQ/src/main/java/org/jooq/impl/InsertQueryImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/InsertQueryImpl.java
@@ -545,14 +545,23 @@ implements
 
 
 
-
-                case FIREBIRD:
                 case IGNITE:
                 case TRINO: {
                     acceptInsertSelect(ctx);
                     break;
                 }
 
+                case FIREBIRD: {
+
+
+
+
+
+                    acceptMerge(ctx);
+
+                    break;
+                }
+
 
 
                 case DUCKDB:
@@ -629,6 +638,7 @@ implements
 
 
 
+
                 case H2:
                 case HSQLDB: {
                     acceptMerge(ctx);