diff --git a/meta/classes/package.bbclass b/meta/classes/package.bbclass
index a1b9482..1e6a872 100644
--- a/meta/classes/package.bbclass
+++ b/meta/classes/package.bbclass
@@ -330,7 +330,7 @@ def runtime_mapping_rename (varname, d):
 #
 
 python package_get_auto_pr() {
-	if d.getVar('USE_PR_SERV', True):
+	if d.getVar('USE_PR_SERV', True) != "0":
 		auto_pr=prserv_get_pr_auto(d)
 		if auto_pr is None:
 			bb.fatal("Can NOT get auto PR revision from remote PR service")
diff --git a/meta/classes/prserv.bbclass b/meta/classes/prserv.bbclass
index de46ff6..18b8589 100644
--- a/meta/classes/prserv.bbclass
+++ b/meta/classes/prserv.bbclass
@@ -12,7 +12,7 @@ def prserv_make_conn(d):
     return conn
 
 def prserv_get_pr_auto(d):
-    if not d.getVar('USE_PR_SERV', True):
+    if d.getVar('USE_PR_SERV', True) != "0":
         bb.warn("Not using network based PR service")
         return None