diff --git a/soc/runtime/dds.c b/soc/runtime/dds.c
index d8b57953c..ad62988d5 100644
--- a/soc/runtime/dds.c
+++ b/soc/runtime/dds.c
@@ -15,8 +15,8 @@
 
 #elif defined DDS_AD9914
 /* Assume 16-bit bus */
-/* DAC calibration takes max. 135us as per datasheet. Take a good margin. */
-#define DURATION_DAC_CAL (30000 << RTIO_FINE_TS_WIDTH)
+/* DAC calibration takes max. 1ms as per datasheet */
+#define DURATION_DAC_CAL (147000 << RTIO_FINE_TS_WIDTH)
 /* not counting final FUD */
 #define DURATION_INIT (10*DURATION_WRITE + DURATION_DAC_CAL)
 #define DURATION_PROGRAM (5*DURATION_WRITE) /* not counting FUD */
diff --git a/soc/runtime/ksupport.c b/soc/runtime/ksupport.c
index eb7a784b7..2331f5195 100644
--- a/soc/runtime/ksupport.c
+++ b/soc/runtime/ksupport.c
@@ -79,7 +79,7 @@ long long int now_init(void)
 
     if(now < 0) {
         rtio_init();
-        now = rtio_get_counter() + (125000 << RTIO_FINE_TS_WIDTH);
+        now = rtio_get_counter() + (272000 << RTIO_FINE_TS_WIDTH);
     }
 
     return now;