diff --git a/.unreleased/bugfix_6024 b/.unreleased/bugfix_6024
new file mode 100644
index 00000000000..f331b36a67d
--- /dev/null
+++ b/.unreleased/bugfix_6024
@@ -0,0 +1,3 @@
+Fixes: #6035 UPDATE on compressed chunk crashes server
+
+Thanks: @alexanderlaw for reporting this issue on server crash
diff --git a/tsl/src/compression/compression.c b/tsl/src/compression/compression.c
index e833ff4cc54..6d6c0542d51 100644
--- a/tsl/src/compression/compression.c
+++ b/tsl/src/compression/compression.c
@@ -2766,6 +2766,9 @@ fill_predicate_context(Chunk *ch, List *predicates, List **filters, List **index
 				else
 					continue;
 
+				/* ignore system-defined attributes */
+				if (var->varattno <= 0)
+					continue;
 				column_name = get_attname(ch->table_id, var->varattno, false);
 				FormData_hypertable_compression *fd =
 					ts_hypertable_compression_get_by_pkey(ch->fd.hypertable_id, column_name);
@@ -2847,6 +2850,9 @@ fill_predicate_context(Chunk *ch, List *predicates, List **filters, List **index
 				if (IsA(ntest->arg, Var))
 				{
 					var = (Var *) ntest->arg;
+					/* ignore system-defined attributes */
+					if (var->varattno <= 0)
+						continue;
 					column_name = get_attname(ch->table_id, var->varattno, false);
 					FormData_hypertable_compression *fd =
 						ts_hypertable_compression_get_by_pkey(ch->fd.hypertable_id, column_name);
diff --git a/tsl/test/expected/compression_update_delete.out b/tsl/test/expected/compression_update_delete.out
index 997303f91ce..55c6553baad 100644
--- a/tsl/test/expected/compression_update_delete.out
+++ b/tsl/test/expected/compression_update_delete.out
@@ -2534,3 +2534,24 @@ LOG:  statement: ROLLBACK;
 RESET client_min_messages;
 LOG:  statement: RESET client_min_messages;
 DROP TABLE tab1;
+--issue: #6024
+CREATE TABLE t(a integer, b integer);
+SELECT create_hypertable('t', 'a', chunk_time_interval=> 10);
+NOTICE:  adding not-null constraint to column "a"
+ create_hypertable 
+-------------------
+ (3,public,t,t)
+(1 row)
+
+INSERT INTO t values(1, 2);
+ALTER TABLE t SET (timescaledb.compress);
+SELECT compress_chunk(show_chunks('t'));
+             compress_chunk             
+----------------------------------------
+ _timescaledb_internal._hyper_3_3_chunk
+(1 row)
+
+-- should not crash
+UPDATE t SET b = 2 WHERE tableoid = 0;
+UPDATE t SET b = 2 WHERE tableoid is null;
+DROP TABLE t;
diff --git a/tsl/test/sql/compression_update_delete.sql b/tsl/test/sql/compression_update_delete.sql
index 97398607c86..2c037f209c2 100644
--- a/tsl/test/sql/compression_update_delete.sql
+++ b/tsl/test/sql/compression_update_delete.sql
@@ -1301,3 +1301,14 @@ ROLLBACK;
 
 RESET client_min_messages;
 DROP TABLE tab1;
+
+--issue: #6024
+CREATE TABLE t(a integer, b integer);
+SELECT create_hypertable('t', 'a', chunk_time_interval=> 10);
+INSERT INTO t values(1, 2);
+ALTER TABLE t SET (timescaledb.compress);
+SELECT compress_chunk(show_chunks('t'));
+-- should not crash
+UPDATE t SET b = 2 WHERE tableoid = 0;
+UPDATE t SET b = 2 WHERE tableoid is null;
+DROP TABLE t;