diff --git a/platform/z1/Makefile.common b/platform/z1/Makefile.common
index 8374573fa..c6080da94 100644
--- a/platform/z1/Makefile.common
+++ b/platform/z1/Makefile.common
@@ -35,7 +35,6 @@ endif
 
 CONTIKI_TARGET_SOURCEFILES += $(ARCH) $(UIPDRIVERS)
 CONTIKI_TARGET_SOURCEFILES += i2cmaster.c adxl345.c
-CONTIKI_TARGET_SOURCEFILES += contiki-z1-platform.c
 
 MCU=msp430x2617
 include $(CONTIKI)/cpu/msp430/Makefile.msp430