diff --git a/Libraries/PeriphDrivers/periphdriver.mk b/Libraries/PeriphDrivers/periphdriver.mk
index 96b7d393755..3c31f96e3cf 100644
--- a/Libraries/PeriphDrivers/periphdriver.mk
+++ b/Libraries/PeriphDrivers/periphdriver.mk
@@ -84,8 +84,7 @@ export COMPILER
 # export MFLOAT_ABI
 
 include ${PERIPH_DRIVER_DIR}/$(TARGET_LC)_files.mk
-IPATH += ${PERIPH_DRIVER_INCLUDE_DIR}
-IPATH += ${PERIPH_DRIVER_DIR}/SYS/Source
+IPATH += ${PERIPH_DRIVER_INCLUDE_DIR} ${PERIPH_DRIVER_DIR}/SYS/Source
 
 ifeq "$(PD_LIBRARY_VARIANT)" ""
 PERIPH_DRIVER_LIB_FILENAME := libPeriphDriver