diff --git a/boards/arm/cc1352r1_launchxl/support/openocd.cfg b/boards/arm/cc1352r1_launchxl/support/openocd.cfg
index 017bb64263b9..16a135a531a0 100644
--- a/boards/arm/cc1352r1_launchxl/support/openocd.cfg
+++ b/boards/arm/cc1352r1_launchxl/support/openocd.cfg
@@ -1 +1,4 @@
 source [find board/ti_cc13x2_launchpad.cfg]
+# Workaround for #21372. This allows OpenOCD to flash correctly
+# with newer 3.x XDS firmware
+adapter_khz 1500