diff --git a/cmd/zdb/zdb.c b/cmd/zdb/zdb.c
index 3a7ef11612..0f8cbcc8cd 100644
--- a/cmd/zdb/zdb.c
+++ b/cmd/zdb/zdb.c
@@ -8336,7 +8336,7 @@ zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
 
 	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
 
-#ifdef _LITTLE_ENDIAN
+#ifdef _ZFS_LITTLE_ENDIAN
 	/* correct the endianness */
 	do_bswap = !do_bswap;
 #endif