diff --git a/postproc/Makefile b/postproc/Makefile
index 457e2d1c9d..ab9139dd3f 100644
--- a/postproc/Makefile
+++ b/postproc/Makefile
@@ -38,7 +38,7 @@ distclean:
 dep:    depend
 
 depend:
-	$(CC) -MM $(CFLAGS) $(SRCS) 1>.depend
+	$(CC) -MM $(CFLAGS) $(SWSSRCS) postprocess.c 1>.depend
 
 cs_test: $(CS_TEST_OBJS)
 	$(CC) $(CS_TEST_OBJS) -o cs_test
@@ -51,7 +51,7 @@ $(SPPLIB): $(SPPOBJS)
 	$(CC) -shared -Wl,-soname,$(SPPLIB).0 \
 	-o $(SPPLIB) $(SPPOBJS)
 endif
-	
+
 $(PPLIB): $(PPOBJS)
 	$(AR) r $(PPLIB) $(PPOBJS)
 
@@ -65,7 +65,7 @@ ifeq ($(SHARED_PP),yes)
 	install -m 644 postprocess.h $(prefix)/include/postproc/postprocess.h
 endif
 
-	
+
 #
 # include dependency files if they exist
 #