diff --git a/src/dbi.c b/src/dbi.c
index 385aa1d9..e386c1d6 100644
--- a/src/dbi.c
+++ b/src/dbi.c
@@ -5,7 +5,7 @@
 
 #if MDBX_ENABLE_DBI_SPARSE
 size_t dbi_bitmap_ctz_fallback(const MDBX_txn *txn, intptr_t bmi) {
-  tASSERT(txn, bmi > 0);
+  tASSERT(txn, bmi != 0);
   bmi &= -bmi;
   if (sizeof(txn->dbi_sparse[0]) > 4) {
     static const uint8_t debruijn_ctz64[64] = {0,  1,  2,  53, 3,  7,  54, 27, 4,  38, 41, 8,  34, 55, 48, 28,
diff --git a/src/dbi.h b/src/dbi.h
index c71478d8..a8f38ff2 100644
--- a/src/dbi.h
+++ b/src/dbi.h
@@ -11,7 +11,7 @@ MDBX_NOTHROW_CONST_FUNCTION MDBX_MAYBE_UNUSED MDBX_INTERNAL size_t dbi_bitmap_ct
                                                                                            intptr_t bmi);
 
 static inline size_t dbi_bitmap_ctz(const MDBX_txn *txn, intptr_t bmi) {
-  tASSERT(txn, bmi > 0);
+  tASSERT(txn, bmi != 0);
   STATIC_ASSERT(sizeof(bmi) >= sizeof(txn->dbi_sparse[0]));
 #if __GNUC_PREREQ(4, 1) || __has_builtin(__builtin_ctzl)
   if (sizeof(txn->dbi_sparse[0]) <= sizeof(int))