diff --git a/target/snitch_cluster/sw/runtime/common/snitch_cluster_cfg.h.tpl b/target/snitch_cluster/sw/runtime/common/snitch_cluster_cfg.h.tpl
index 2daf9bc98..8df2db419 100644
--- a/target/snitch_cluster/sw/runtime/common/snitch_cluster_cfg.h.tpl
+++ b/target/snitch_cluster/sw/runtime/common/snitch_cluster_cfg.h.tpl
@@ -9,7 +9,7 @@
 #define SNRT_CLUSTER_NUM ${cfg['nr_clusters']}
 #define SNRT_CLUSTER_DM_CORE_NUM 1
 #define SNRT_TCDM_START_ADDR CLUSTER_TCDM_BASE_ADDR
-#define SNRT_TCDM_SIZE (CLUSTER_PERIPH_BASE_ADDR - CLUSTER_TCDM_BASE_ADDR)
+#define SNRT_TCDM_SIZE (ALIAS_BOOTROM_BASE_ADDR - CLUSTER_TCDM_BASE_ADDR)
 #define SNRT_CLUSTER_OFFSET ${cfg['cluster']['cluster_base_offset']}
 
 // Software configuration