diff --git a/lib/server/size.js b/lib/server/size.js
index df3c3d3a..adea4ee1 100644
--- a/lib/server/size.js
+++ b/lib/server/size.js
@@ -94,11 +94,13 @@
                         ++asyncRunning;
                         
                         fs.readdir(dir, function(error, files) {
-                            if (error && stopOnError) {
+                            asyncRunning--;
+                            
+                            if (!error) {
+                                onReaddir(dir, files);
+                            } else if (error && stopOnError) {
                                 wasError = true;
                                 emitter.emit('error', error);
-                            } else {
-                                onReaddir(dir, files);
                             }
                         });
                     }
@@ -109,9 +111,7 @@
         }
         
         function onReaddir(dir, files) {
-            var n   = files.length;
-            
-            asyncRunning--;
+            var n        = files.length;
             
             fileCounter += n;