diff --git a/feeds/packages/net/asterisk-1.8.x/Makefile b/feeds/packages/net/asterisk-1.8.x/Makefile
index ab95160..4088e9c 100644
--- a/feeds/packages/net/asterisk-1.8.x/Makefile
+++ b/feeds/packages/net/asterisk-1.8.x/Makefile
@@ -253,6 +253,8 @@ else
 	--without-dahdi
 endif
 
+SITE_VARS+= PGSQL_DIR="$(STAGING_DIR)/usr"
+
 ifneq ($(SDK)$(CONFIG_PACKAGE_asterisk18-chan-gtalk),)
   CONFIGURE_ARGS+= \
 	--with-gnutls="$(STAGING_DIR)/usr" \