diff --git a/abaplint.json b/abaplint.json
index 9a7cc742..168e2ea2 100644
--- a/abaplint.json
+++ b/abaplint.json
@@ -4,7 +4,7 @@
     "skipGeneratedGatewayClasses": true,
     "skipGeneratedPersistentClasses": true,
     "skipGeneratedFunctionGroups": true,
-    "applyUnspecifiedRules": true
+    "applyUnspecifiedRules": false
   },
   "rules": {
     "7bit_ascii": {
diff --git a/src/checks/zcl_aoc_check_26.clas.abap b/src/checks/zcl_aoc_check_26.clas.abap
index 52e3692d..85a5dfab 100644
--- a/src/checks/zcl_aoc_check_26.clas.abap
+++ b/src/checks/zcl_aoc_check_26.clas.abap
@@ -168,7 +168,9 @@ CLASS ZCL_AOC_CHECK_26 IMPLEMENTATION.
       RETURN.
     ENDIF.
 
-    rv_as4user = ls_dd02v-as4user.
+    IF ls_dd02v-tabclass = 'TRANSP'.
+      rv_as4user = ls_dd02v-as4user.
+    ENDIF.
 
   ENDMETHOD.
 
diff --git a/src/checks/zcl_aoc_check_26.clas.testclasses.abap b/src/checks/zcl_aoc_check_26.clas.testclasses.abap
index a9d7de4d..8c8c78f0 100644
--- a/src/checks/zcl_aoc_check_26.clas.testclasses.abap
+++ b/src/checks/zcl_aoc_check_26.clas.testclasses.abap
@@ -22,7 +22,8 @@ CLASS ltcl_test DEFINITION FOR TESTING
       test001_02 FOR TESTING,
       test001_03 FOR TESTING,
       test001_04 FOR TESTING,
-      test001_05 FOR TESTING.
+      test001_05 FOR TESTING,
+      test001_06 FOR TESTING.
 
 ENDCLASS.       "lcl_Test
 
@@ -104,4 +105,15 @@ CLASS ltcl_test IMPLEMENTATION.
 
   ENDMETHOD.
 
-ENDCLASS.       "lcl_Test
+  METHOD test001_06.
+* ===========
+
+    _code 'INSERT itab INTO itab INDEX sy-tabix.'.
+
+    ms_result = zcl_aoc_unit_test=>check( mt_code ).
+
+    cl_abap_unit_assert=>assert_initial( ms_result ).
+
+  ENDMETHOD.
+
+ENDCLASS.