diff --git a/tcl/board/olimex_stm32_h405.cfg b/tcl/board/olimex_stm32_h405.cfg
new file mode 100644
index 000000000..f2f1d7f24
--- /dev/null
+++ b/tcl/board/olimex_stm32_h405.cfg
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Olimex STM32-H405 eval board
+# https://www.olimex.com/Products/ARM/ST/STM32-H405/
+
+# Work-area size (RAM size) = 128kB for STM32F405RG device
+set WORKAREASIZE 0x20000
+
+source [find target/stm32f4x.cfg]