diff --git a/src/dosinst.c b/src/dosinst.c
index 0923cf7..ef41081 100644
--- a/src/dosinst.c
+++ b/src/dosinst.c
@@ -1525,7 +1525,6 @@
     const char	*vim_ext_ThreadingModel = "Apartment";
     const char	*vim_ext_name = "Vim Shell Extension";
     const char	*vim_ext_clsid = "{51EEE242-AD87-11d3-9C1E-0090278BBD99}";
-    char	buf[BUFSIZE];
     char	vim_exe_path[BUFSIZE];
     char	display_name[BUFSIZE];
     char	uninstall_string[BUFSIZE];
@@ -1571,12 +1570,12 @@
     if (interactive)
     {
 	sprintf(display_name, "Vim " VIM_VERSION_SHORT);
-	sprintf(uninstall_string, "%suninstal.exe", buf);
+	sprintf(uninstall_string, "%s\\uninstal.exe", installdir);
     }
     else
     {
 	sprintf(display_name, "Vim " VIM_VERSION_SHORT " (self-installing)");
-	sprintf(uninstall_string, "%suninstall-gui.exe", buf);
+	sprintf(uninstall_string, "%s\\uninstall-gui.exe", installdir);
     }
 
     lRet = register_uninstall(