diff --git a/Marlin/Makefile b/Marlin/Makefile
index a4de46a64..3bd0ae3bf 100644
--- a/Marlin/Makefile
+++ b/Marlin/Makefile
@@ -260,7 +260,8 @@ CXXSRC = WMath.cpp WString.cpp Print.cpp Marlin_main.cpp	\
 	MarlinSerial.cpp Sd2Card.cpp SdBaseFile.cpp SdFatUtil.cpp	\
 	SdFile.cpp SdVolume.cpp motion_control.cpp planner.cpp		\
 	stepper.cpp temperature.cpp cardreader.cpp ConfigurationStore.cpp \
-	watchdog.cpp SPI.cpp Servo.cpp Tone.cpp ultralcd.cpp digipot_mcp4451.cpp
+	watchdog.cpp SPI.cpp Servo.cpp Tone.cpp ultralcd.cpp digipot_mcp4451.cpp \
+	vector_3.cpp qr_solve.cpp
 ifeq ($(LIQUID_TWI2), 0)
 CXXSRC += LiquidCrystal.cpp
 else