diff --git a/regexp/configure b/regexp/configure
index 01a22eb..e27df5f 100755
--- a/regexp/configure
+++ b/regexp/configure
@@ -20645,7 +20645,7 @@ s/^[^=]*=[	 ]*$//;
 }'
 fi
 
-DEFS=-DHAVE_CONFIG_H
+DEFS="-DDBUG_OFF -DHAVE_CONFIG_H"
 
 ac_libobjs=
 ac_ltlibobjs=