diff --git a/src/dosinst.c b/src/dosinst.c
index 5b54380..809789f 100644
--- a/src/dosinst.c
+++ b/src/dosinst.c
@@ -762,6 +762,7 @@
 	    fprintf(fd, "@echo off\n");
 	    fprintf(fd, "rem -- Run Vim --\n");
 	    fprintf(fd, "\n");
+	    fprintf(fd, "setlocal\n");
 
 	    /* Don't use double quotes for the "set" argument, also when it
 	     * contains a space.  The quotes would be included in the value
@@ -793,6 +794,9 @@
 	    fprintf(fd, "if .%%1==. goto loopend\n");
 	    if (*exename == 'g')
 	    {
+		fprintf(fd, "if NOT .%%1==.--nofork goto noforklongarg\n");
+		fprintf(fd, "set VIMNOFORK=1\n");
+		fprintf(fd, ":noforklongarg\n");
 		fprintf(fd, "if NOT .%%1==.-f goto noforkarg\n");
 		fprintf(fd, "set VIMNOFORK=1\n");
 		fprintf(fd, ":noforkarg\n");