diff --git a/tockloader/board_interface.py b/tockloader/board_interface.py
index 77a2884..c644fff 100644
--- a/tockloader/board_interface.py
+++ b/tockloader/board_interface.py
@@ -55,7 +55,7 @@ class BoardInterface:
             "page_size": 4096,
             "no_attribute_table": True,
             "jlink": {
-                "device": "nrf52",
+                "device": "nrf52840_xxAA",
                 "address_maximum": 0x11FFFFFF,
             },
             "openocd": {
diff --git a/tockloader/jlinkexe.py b/tockloader/jlinkexe.py
index 10d1865..09f30f1 100644
--- a/tockloader/jlinkexe.py
+++ b/tockloader/jlinkexe.py
@@ -71,7 +71,7 @@ def _get_tockloader_board_from_emulators(self, emulators):
             if emulator["ProductName"] == "J-Link OB-SAM3U128-V2-NordicSem":
                 # This seems to match both the nRF52dk (PCA10040) and the
                 # nRF52840dk (PCA10056). From a jlink perspective, they are
-                # the same, which is nice.
+                # close enough, which is nice.
                 return "nrf52dk"
             if emulator["ProductName"] == "J-Link OB-nRF5340-NordicSemi":
                 # This matches the new (3.0.0+) version of the nRF52840dk