diff --git a/src/makeprog.vc b/src/makeprog.vc
index 1a4c5ef2bf..158e45cb18 100644
--- a/src/makeprog.vc
+++ b/src/makeprog.vc
@@ -13,7 +13,9 @@
 # Set WXDIR for your system
 WXDIR = $(WXWIN)
 
+!ifndef WXUSINGDLL
 WXUSINGDLL=0
+!endif
 
 !include $(WXDIR)\src\makevc.env