diff --git a/.gitmodules b/.gitmodules
index 01bc0843818bdb182556e856eb8b307b9740b50e..1faf8ea39316e593d4a5eaf3434f142c0ede30bc 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "libopencm3"]
 	path = ext/libopencm3
-	url = https://github.com/libopencm3/libopencm3.git
+	url = https://github.com/derf/libopencm3.git
diff --git a/ext/libopencm3 b/ext/libopencm3
index 24bef9c49eda109e92e926e065b246a71d454f2d..8acd8fa592ecd5debf93208463d39688e98b9516 160000
--- a/ext/libopencm3
+++ b/ext/libopencm3
@@ -1 +1 @@
-Subproject commit 24bef9c49eda109e92e926e065b246a71d454f2d
+Subproject commit 8acd8fa592ecd5debf93208463d39688e98b9516
diff --git a/src/arch/stm32f446re-nucleo/Makefile.inc b/src/arch/stm32f446re-nucleo/Makefile.inc
index 70384b556fc59a92d6a0d2bcb148a84e90d77fd8..5518a4c104e91225de25ad49df194e51fca78b19 100644
--- a/src/arch/stm32f446re-nucleo/Makefile.inc
+++ b/src/arch/stm32f446re-nucleo/Makefile.inc
@@ -84,7 +84,6 @@ ext/libopencm3/Makefile:
 	git submodule update --init
 
 ext/libopencm3/lib/libopencm3_stm32f4.a: ext/libopencm3/Makefile
-	find ext/libopencm3 -type f -exec sed -i 's/python$$/python3/' '{}' ';'
 	${MAKE} -C ext/libopencm3
 
 build/system.elf: ${OBJECTS} ext/libopencm3/lib/libopencm3_stm32f4.a