diff --git a/targets/targets.json b/targets/targets.json
index 109f93fde6..e88ab8ddd2 100755
--- a/targets/targets.json
+++ b/targets/targets.json
@@ -3668,7 +3668,8 @@
             "SPI_ASYNCH",
             "STCLK_OFF_DURING_SLEEP",
             "TRNG",
-            "USTICKER"
+            "USTICKER",
+            "SLEEP"
         ],
         "extra_labels": [
             "NORDIC",