diff --git a/board/cr50/board.c b/board/cr50/board.c
index 766d971491..3910af7159 100644
--- a/board/cr50/board.c
+++ b/board/cr50/board.c
@@ -130,8 +130,7 @@ static void board_init(void)
 	init_timers();
 	init_interrupts();
 	init_trng();
-	/* TODO(crosbug.com/p/53952): enable jittery clock */
-	/* init_jittery_clock(1); */
+	init_jittery_clock(1);
 	init_runlevel(PERMISSION_MEDIUM);
 	/* Initialize NvMem partitions */
 	nvmem_init();
diff --git a/chip/g/jitter.c b/chip/g/jitter.c
index 35bf8142c3..b0686bc0bf 100644
--- a/chip/g/jitter.c
+++ b/chip/g/jitter.c
@@ -27,7 +27,7 @@ void init_jittery_clock(int highsec)
 	int bank;
 
 	if (highsec)
-		stepx16 = 0xff - trimfast;
+		stepx16 = (delta * 7) >> 1;
 	else
 		stepx16 = 2 * (trim48 - trimfast);