diff --git a/jam/Jambase b/jam/Jambase
index 9cee390b0c..85eb713327 100644
--- a/jam/Jambase
+++ b/jam/Jambase
@@ -311,7 +311,7 @@ if $(NT) {
 # General defaults; a lot like UNIX
 #
 
-AR		?= ar rD ;
+AR		?= ar ru ;
 AS		?= as ;
 ASFLAGS		?= ;
 AWK		?= awk ;
diff --git a/jam/jambase.c b/jam/jambase.c
index 72b2f23085..73ae9c9f28 100644
--- a/jam/jambase.c
+++ b/jam/jambase.c
@@ -152,7 +152,7 @@ const char *jambase[] = {
 "YACCFILES	?= y.tab ;\n",
 "YACCFLAGS	?= -d ;\n",
 "}\n",
-"AR		?= ar rD ;\n",
+"AR		?= ar ru ;\n",
 "AS		?= as ;\n",
 "ASFLAGS		?= ;\n",
 "AWK		?= awk ;\n",