diff --git a/src/hush_utils.h b/src/hush_utils.h
index 250972e1a..0c97567b7 100644
--- a/src/hush_utils.h
+++ b/src/hush_utils.h
@@ -1921,7 +1921,7 @@ void hush_args(char *argv0)
             if (strncmp(SMART_CHAIN_SYMBOL, "DRAGONX", 7) == 0) {
                 ASSETCHAINS_RANDOMX_VALIDATION = 2838976; // TBD: set to coordinated upgrade height
             } else if (strncmp(SMART_CHAIN_SYMBOL, "TUMIN", 5) == 0) {
-                ASSETCHAINS_RANDOMX_VALIDATION = 100; // TBD: set to coordinated upgrade height
+                ASSETCHAINS_RANDOMX_VALIDATION = 1200; // TBD: set to coordinated upgrade height
             } else {
                 ASSETCHAINS_RANDOMX_VALIDATION = 1; // all other RandomX HACs: enforce from height 1
             }