diff --git a/meta-digi-dey/dynamic-layers/stm-st-stm32mp/recipes-devtools/cmsis-svd/cmsis-svd_git.bbappend b/meta-digi-dey/dynamic-layers/stm-st-stm32mp/recipes-devtools/cmsis-svd/cmsis-svd_git.bbappend
new file mode 100644
index 000000000..c8888b330
--- /dev/null
+++ b/meta-digi-dey/dynamic-layers/stm-st-stm32mp/recipes-devtools/cmsis-svd/cmsis-svd_git.bbappend
@@ -0,0 +1,4 @@
+# "master" branch was renamed to "main", which causes do_fetch() to fail.
+# Reflect this in SRC_URI.
+SRC_URI:remove = "git://github.com/posborne/cmsis-svd.git;protocol=https;branch=master"
+SRC_URI:append = " git://github.com/posborne/cmsis-svd.git;protocol=https;branch=main"