diff --git a/nt/configure.bat b/nt/configure.bat
index 994a41d259e..686685d0029 100755
--- a/nt/configure.bat
+++ b/nt/configure.bat
@@ -213,6 +213,7 @@ goto again
 
 :withfont
 set usercflags=%usercflags%%sep1%-DUSE_FONT_BACKEND
+set sep1= %nothing%
 set usefontbackend=Y
 shift
 goto again