diff --git a/cmake_modules/LibnfcDrivers.cmake b/cmake_modules/LibnfcDrivers.cmake
index 47c0e73..219163b 100644
--- a/cmake_modules/LibnfcDrivers.cmake
+++ b/cmake_modules/LibnfcDrivers.cmake
@@ -24,12 +24,12 @@ ENDIF(LIBNFC_DRIVER_PN533_USB)
 
 IF(LIBNFC_DRIVER_ARYGON)
   ADD_DEFINITIONS("-DDRIVER_ARYGON_ENABLED")
-  SET(DRIVERS_SOURCES drivers/arygon)
+  SET(DRIVERS_SOURCES ${DRIVERS_SOURCES} drivers/arygon)
 ENDIF(LIBNFC_DRIVER_ARYGON)
 
 IF(LIBNFC_DRIVER_PN532_UART)
   ADD_DEFINITIONS("-DDRIVER_PN532_UART_ENABLED")
-  SET(DRIVERS_SOURCES drivers/pn532_uart)
+  SET(DRIVERS_SOURCES ${DRIVERS_SOURCES} drivers/pn532_uart)
 ENDIF(LIBNFC_DRIVER_PN532_UART)
 
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/drivers)