diff --git a/sys/windows/vs/package/package.nmake b/sys/windows/vs/package/package.nmake
index f1db87c6c..0c01ca074 100644
--- a/sys/windows/vs/package/package.nmake
+++ b/sys/windows/vs/package/package.nmake
@@ -42,7 +42,7 @@ X11     = $(ROOTDIR)win\X11     # X11 support files
 LIBDIR  = $(ROOTDIR)lib         # libraries and external bits
 SUBMDIR = $(ROOTDIR)submodules  # NetHack git submodules
 SndWavDir = $(ROOTDIR)sound\wav # sound files that get integrated
-DocDir  = $(ROOTDIR)doc
+DocDir  = $(ROOTDIR)doc\
 
 # Directories we might place collected things
 #