diff --git a/bacnet-stack/ports/win32/MAKEFILE.MAK b/bacnet-stack/ports/win32/MAKEFILE.MAK
index 43e9a1e6..6c946103 100644
--- a/bacnet-stack/ports/win32/MAKEFILE.MAK
+++ b/bacnet-stack/ports/win32/MAKEFILE.MAK
@@ -58,7 +58,7 @@ TLIB = $(BORLAND_DIR)\bin\tlib
 # Include directories
 #
 CC_DIR     = $(BORLAND_DIR)\BIN
-INCL_DIRS = -I$(BORLAND_DIR)\include;..\..\;.
+INCL_DIRS = -I$(BORLAND_DIR)\include;..\..\;..\..\demo\object\;.
 
 CFLAGS = $(INCL_DIRS) $(CS_FLAGS) $(DEFINES)