diff --git a/checks.d/postgres.py b/checks.d/postgres.py
index 3ea143b690..e35434743e 100644
--- a/checks.d/postgres.py
+++ b/checks.d/postgres.py
@@ -508,7 +508,8 @@ def _collect_stats(self, key, db, instance_tags, relations, custom_metrics):
                     # v[0] == (metric_name, submit_function)
                     # v[1] == the actual value
                     # tags are
-                    [v[0][1](self, v[0][0], v[1], tags=tags) for v in values]
+                    for v in values:
+                        v[0][1](self, v[0][0], v[1], tags=tags)
 
             cursor.close()
         except InterfaceError, e:
diff --git a/checks.d/riak.py b/checks.d/riak.py
index bdaa927638..68991691f0 100644
--- a/checks.d/riak.py
+++ b/checks.d/riak.py
@@ -51,7 +51,8 @@ class Riak(AgentCheck):
     def __init__(self, name, init_config, agentConfig, instances=None):
         AgentCheck.__init__(self, name, init_config, agentConfig, instances)
         for k in ["mean", "median", "95", "99", "100"]:
-            [self.keys.append(m + "_" + k) for m in self.stat_keys]
+            for m in self.stat_keys:
+                self.keys.append(m + "_" + k)
 
         self.prev_coord_redirs_total = -1
 
@@ -81,7 +82,9 @@ def check(self, instance):
         self.service_check(
             self.SERVICE_CHECK_NAME, AgentCheck.OK, tags=service_check_tags)
 
-        [self.gauge("riak." + k, stats[k], tags=tags) for k in self.keys if k in stats]
+        for k in self.keys:
+            if k in stats:
+                self.gauge("riak." + k, stats[k], tags=tags)
 
         coord_redirs_total = stats["coord_redirs_total"]
         if self.prev_coord_redirs_total > -1: