diff --git a/radio/src/targets/taranis/rtc_driver.cpp b/radio/src/targets/common/arm/stm32/rtc_driver.cpp
similarity index 95%
rename from radio/src/targets/taranis/rtc_driver.cpp
rename to radio/src/targets/common/arm/stm32/rtc_driver.cpp
index 1a1071032..2807b1add 100644
--- a/radio/src/targets/taranis/rtc_driver.cpp
+++ b/radio/src/targets/common/arm/stm32/rtc_driver.cpp
@@ -18,7 +18,7 @@
  * GNU General Public License for more details.
  */
 
-#include "../../opentx.h"
+#include "opentx.h"
 
 void rtcSetTime(struct gtm * t)
 {
diff --git a/radio/src/targets/horus/CMakeLists.txt b/radio/src/targets/horus/CMakeLists.txt
index f8376ea09..6d109aa62 100644
--- a/radio/src/targets/horus/CMakeLists.txt
+++ b/radio/src/targets/horus/CMakeLists.txt
@@ -40,7 +40,6 @@ set(GUI_SRC
   ${LAYOUTS_SRC}
   ${WIDGETS_SRC}
   )
-set(SRC ${SRC} targets/taranis/rtc_driver.cpp)
 if(DISK_CACHE)
   set(SRC ${SRC} disk_cache.cpp)
   add_definitions(-DDISK_CACHE)
@@ -49,6 +48,7 @@ set(TARGET_SRC
   ${TARGET_SRC}
   board.cpp
   extmodule_driver.cpp
+  ../common/arm/stm32/rtc_driver.cpp
   )
 set(FIRMWARE_TARGET_SRC
   ${FIRMWARE_TARGET_SRC}
diff --git a/radio/src/targets/taranis/CMakeLists.txt b/radio/src/targets/taranis/CMakeLists.txt
index 7cb65baa7..5f57f9984 100644
--- a/radio/src/targets/taranis/CMakeLists.txt
+++ b/radio/src/targets/taranis/CMakeLists.txt
@@ -84,7 +84,7 @@ set(TARGET_SRC
   ${TARGET_SRC}
   board.cpp
   extmodule_driver.cpp
-  rtc_driver.cpp
+  ../common/arm/stm32/rtc_driver.cpp
   )
 set(FIRMWARE_SRC
   ${FIRMWARE_SRC}