diff --git a/examples/embedding/Makefile.upylib b/examples/embedding/Makefile.upylib
index 6896354fdeec0c39a86f3bd8bd475d996a81aaa5..6d6302050cf7889667d5c7b7c8d217624e1e6dcb 100644
--- a/examples/embedding/Makefile.upylib
+++ b/examples/embedding/Makefile.upylib
@@ -128,7 +128,7 @@ endif
 MAIN_C = main.c
 
 # source files
-SRC_C = $(addprefix $(MPTOP)/ports/unix/,\
+SRC_C = $(addprefix ports/unix/,\
 	$(MAIN_C) \
 	gccollect.c \
 	unix_mphal.c \