diff --git a/library/platform_util.c b/library/platform_util.c
index 3fa943738..5e938f9c9 100644
--- a/library/platform_util.c
+++ b/library/platform_util.c
@@ -269,8 +269,8 @@ void mbedtls_platform_random_delay( void )
         i++;
         /* Dummy calculations to increase the time between iterations and
          * make side channel attack more difficult by reducing predictability
-         * of its behaviour */
-        shift = rn_2 & 0x07;
+         * of its behaviour. */
+        shift = ( rn_2 & 0x07 ) + 1;
         if ( i % 2 )
             rn_2 = ( rn_2 >> shift ) | ( rn_2 << ( 32 - shift ) );
         else