1 files changed, 1 insertions, 0 deletions
diff --git a/win/tcl.m4 b/win/tcl.m4
index e55df16..abbf32d 100644
--- a/win/tcl.m4
+++ b/win/tcl.m4
@@ -224,6 +224,7 @@ AC_DEFUN(SC_ENABLE_THREADS, [
 	TCL_THREADS=0
 	AC_MSG_RESULT([no (default)])
     fi
+    AC_SUBST(TCL_THREADS)
 ])
 
 #------------------------------------------------------------------------