diff --git a/src/dsql/DdlNodes.epp b/src/dsql/DdlNodes.epp
index 4638f6fdcc6..2246d86583f 100644
--- a/src/dsql/DdlNodes.epp
+++ b/src/dsql/DdlNodes.epp
@@ -268,6 +268,7 @@ static void checkSpTrigDependency(thread_db* tdbb, jrd_tra* transaction,
 		FIRST 1
 		DEP IN RDB$DEPENDENCIES
 		WITH DEP.RDB$DEPENDED_ON_NAME EQ relationName.c_str() AND
+			 DEP.RDB$DEPENDED_ON_TYPE EQ obj_relation AND
 			 DEP.RDB$FIELD_NAME EQ fieldName.c_str()
 	{
 		MetaName depName(DEP.RDB$DEPENDENT_NAME);
diff --git a/src/jrd/idx.h b/src/jrd/idx.h
index 5e989e317bd..25987e5afa9 100644
--- a/src/jrd/idx.h
+++ b/src/jrd/idx.h
@@ -176,13 +176,16 @@ static const struct ini_idx_t indices[] =
 		SEGMENT(f_coll_id, idx_numeric),		// collation id
 		SEGMENT(f_coll_cs_id, idx_numeric)		// character set id
 	}},
-	// define index RDB$INDEX_27 for RDB$DEPENDENCIES RDB$DEPENDENT_NAME;
-	INDEX(27, rel_dpds, 0, 1)
-		SEGMENT(f_dpd_name, idx_metadata)		// dependent name
-	}},
-	// define index RDB$INDEX_28 for RDB$DEPENDENCIES RDB$DEPENDED_ON_NAME;
-	INDEX(28, rel_dpds, 0, 1)
-		SEGMENT(f_dpd_o_name, idx_metadata)		// dependent on name
+	// define index RDB$INDEX_27 for RDB$DEPENDENCIES RDB$DEPENDENT_NAME, RDB$DEPENDENT_TYPE;
+	INDEX(27, rel_dpds, 0, 2)
+		SEGMENT(f_dpd_name, idx_metadata),		// dependent name
+		SEGMENT(f_dpd_type, idx_numeric)		// dependent type
+	}},
+	// define index RDB$INDEX_28 for RDB$DEPENDENCIES RDB$DEPENDED_ON_NAME, RDB$DEPENDED_ON_TYPE, RDB$FIELD_NAME;
+	INDEX(28, rel_dpds, 0, 3)
+		SEGMENT(f_dpd_o_name, idx_metadata),	// dependent on name
+		SEGMENT(f_dpd_o_type, idx_numeric),		// dependent on type
+		SEGMENT(f_dpd_f_name, idx_metadata)		// field name
 	}},
 	// define index RDB$INDEX_29 for RDB$USER_PRIVILEGES RDB$RELATION_NAME;
 	INDEX(29, rel_priv, 0, 1)