diff --git a/tools/Rules.in b/tools/Rules.in
index 48201824..a10f76fd 100644
--- a/tools/Rules.in
+++ b/tools/Rules.in
@@ -10,7 +10,7 @@ static-dirs := nest filter $(addprefix proto/,$(protocols))
 static-dir-paths := $(addprefix $(srcdir)/,$(static-dirs))
 dynamic-dirs := lib conf
 dynamic-dir-paths := $(dynamic-dirs)
-client-dirs := client
+client-dirs := @CLIENT@
 client-dir-paths := $(client-dirs)
 
 all-dirs:=$(static-dirs) $(dynamic-dirs) $(client-dirs)