diff --git a/cache/stores/file/lib.php b/cache/stores/file/lib.php
index 3ef346976d6..0aa3f48ce94 100644
--- a/cache/stores/file/lib.php
+++ b/cache/stores/file/lib.php
@@ -553,11 +553,14 @@ class cachestore_file implements cache_store, cache_is_key_aware {
         if (!empty($config['path'])) {
             $data['path'] = $config['path'];
         }
-        if (!empty($config['autocreate'])) {
-            $data['autocreate'] = $config['autocreate'];
+        if (isset($config['autocreate'])) {
+            $data['autocreate'] = (bool)$config['autocreate'];
         }
-        if (!empty($config['prescan'])) {
-            $data['prescan'] = $config['prescan'];
+        if (isset($config['singledirectory'])) {
+            $data['singledirectory'] = (bool)$config['singledirectory'];
+        }
+        if (isset($config['prescan'])) {
+            $data['prescan'] = (bool)$config['prescan'];
         }
         $editform->set_data($data);
     }
diff --git a/cache/stores/memcached/lib.php b/cache/stores/memcached/lib.php
index ed079b1767e..527a5cae19d 100644
--- a/cache/stores/memcached/lib.php
+++ b/cache/stores/memcached/lib.php
@@ -408,8 +408,8 @@ class cachestore_memcached implements cache_store {
             }
             $data['servers'] = join("\n", $servers);
         }
-        if (!empty($config['compression'])) {
-            $data['compression'] = 1;
+        if (isset($config['compression'])) {
+            $data['compression'] = (bool)$config['compression'];
         }
         if (!empty($config['serialiser'])) {
             $data['serialiser'] = $config['serialiser'];
@@ -420,8 +420,8 @@ class cachestore_memcached implements cache_store {
         if (!empty($config['hash'])) {
             $data['hash'] = $config['hash'];
         }
-        if (!empty($config['bufferwrites'])) {
-            $data['bufferwrites'] = 1;
+        if (isset($config['bufferwrites'])) {
+            $data['bufferwrites'] = (bool)$config['bufferwrites'];
         }
         $editform->set_data($data);
     }
diff --git a/cache/stores/mongodb/lib.php b/cache/stores/mongodb/lib.php
index c37e91da3fb..4bd4229130e 100644
--- a/cache/stores/mongodb/lib.php
+++ b/cache/stores/mongodb/lib.php
@@ -419,6 +419,7 @@ class cachestore_mongodb implements cache_store {
             $return['usesafe'] = true;
             if (!empty($data->usesafevalue)) {
                 $return['usesafe'] = (int)$data->usesafevalue;
+                $return['usesafevalue'] = $return['usesafe'];
             }
         }
         return $return;
@@ -438,8 +439,8 @@ class cachestore_mongodb implements cache_store {
         if (!empty($config['database'])) {
             $data['database'] = $config['database'];
         }
-        if (!empty($config['extendedmode'])) {
-            $data['extendedmode'] = 1;
+        if (isset($config['extendedmode'])) {
+            $data['extendedmode'] = (bool)$config['extendedmode'];
         }
         if (!empty($config['username'])) {
             $data['username'] = $config['username'];
@@ -450,11 +451,11 @@ class cachestore_mongodb implements cache_store {
         if (!empty($config['replicaset'])) {
             $data['replicaset'] = $config['replicaset'];
         }
-        if (!empty($config['usesafe'])) {
-            $data['usesafe'] = 1;
-            if ($data['usesafe'] !== true) {
-                $data['usesafevalue'] = (int)$data['usesafe'];
-            }
+        if (isset($config['usesafevalue'])) {
+            $data['usesafe'] = true;
+            $data['usesafevalue'] = (int)$data['usesafe'];
+        } else if (isset($config['usesafe'])) {
+            $data['usesafe'] = (bool)$config['usesafe'];
         }
         $editform->set_data($data);
     }