diff --git a/builder/main.py b/builder/main.py
index d34c935..2c60bbc 100644
--- a/builder/main.py
+++ b/builder/main.py
@@ -209,6 +209,9 @@ def _jlink_cmd_script(env, source):
         openocd_args.extend(
             ["-c", "adapter speed %s" % env.GetProjectOption("debug_speed")]
         )
+    openocd_args.extend([
+        "-c", "targets %s" % env.GetProjectOption("board_upload_target", "rp2040.core0")
+    ])
     openocd_args.extend([
         "-c", "program {$SOURCE} %s verify reset; shutdown;" %
         board.get("upload.offset_address", "")