diff --git a/platformio.ini b/platformio.ini
index 232fabb..6f3a728 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -3,6 +3,7 @@
 
 [platformio]
 include_dir = Inc
+src_dir     = Src
 
 [env:genericSTM32F103RC]
 platform        = ststm32