diff --git a/src/cursor.h b/src/cursor.h
index cf5c8548..0289933a 100644
--- a/src/cursor.h
+++ b/src/cursor.h
@@ -236,7 +236,7 @@ enum cursor_checking {
 MDBX_INTERNAL int __must_check_result cursor_validate(const MDBX_cursor *mc);
 
 MDBX_MAYBE_UNUSED MDBX_NOTHROW_PURE_FUNCTION static inline size_t cursor_dbi(const MDBX_cursor *mc) {
-  cASSERT(mc, mc->txn && mc->txn->signature == txn_signature);
+  cASSERT(mc, mc->txn->signature == txn_signature);
   size_t dbi = mc->dbi_state - mc->txn->dbi_state;
   cASSERT(mc, dbi < mc->txn->env->n_dbi);
   return dbi;