diff --git a/flight/targets/CopterControl/Makefile b/flight/targets/CopterControl/Makefile
index f5a2b64b3..c2c69871d 100644
--- a/flight/targets/CopterControl/Makefile
+++ b/flight/targets/CopterControl/Makefile
@@ -58,7 +58,7 @@ endif
 # Use file-extension c for "c-only"-files
 ifndef TESTAPP
     ## Application Core
-    SRC += $(OPMODULEDIR)}/System/systemmod.c
+    SRC += $(OPMODULEDIR)/System/systemmod.c
     SRC += $(OPSYSTEM)/coptercontrol.c
     SRC += $(OPSYSTEM)/pios_board.c
     SRC += $(OPSYSTEM)/pios_usb_board_data.c