diff --git a/qa/qa_cluster.py b/qa/qa_cluster.py
index ac3419ca0f871a7c899fe47eced078dc19ee9351..e0559050e51bb9274c03a2cd8c7629c73f195600 100644
--- a/qa/qa_cluster.py
+++ b/qa/qa_cluster.py
@@ -183,7 +183,7 @@ def TestClusterInit(rapi_user, rapi_secret):
     for spec_val in ("min", "max", "std"):
       spec = qa_config.get("ispec_%s_%s" %
                            (spec_type.replace("-", "_"), spec_val), None)
-      if spec:
+      if spec is not None:
         cmd.append("--specs-%s=%s=%d" % (spec_type, spec_val, spec))
 
   if master.secondary: