diff --git a/dbm/include/mcom_db.h b/dbm/include/mcom_db.h
index bf2014d9602..4070a0487a3 100644
--- a/dbm/include/mcom_db.h
+++ b/dbm/include/mcom_db.h
@@ -174,10 +174,14 @@
 #endif
 
 #ifdef __QNX__
+#ifdef __QNXNTO__
+#include <sys/param.h>
+#else
 #define LITTLE_ENDIAN	1234
 #define BIG_ENDIAN	4321
 #define BYTE_ORDER	LITTLE_ENDIAN
 #endif
+#endif
 
 #ifdef SNI
 /* #include <sys/hetero.h> */
diff --git a/dbm/src/hash.c b/dbm/src/hash.c
index c3ceb045fcd..530160244de 100644
--- a/dbm/src/hash.c
+++ b/dbm/src/hash.c
@@ -419,8 +419,8 @@ init_hash(HTAB *hashp, const char *file, HASHINFO *info)
 			return (NULL);
 
 #if !defined(_WIN32) && !defined(_WINDOWS) && !defined(macintosh) && !defined(VMS) && !defined(XP_OS2)
-#ifdef __QNX__
-		hashp->BSIZE = statbuf.st_size;
+#if defined(__QNX__) && !defined(__QNXNTO__)
+		hashp->BSIZE = 512; /* prefered blk size on qnx4 */
 #else
 		hashp->BSIZE = statbuf.st_blksize;
 #endif