diff --git a/MDAF/MDAF.py b/MDAF/MDAF.py
index bd96093..da15be8 100644
--- a/MDAF/MDAF.py
+++ b/MDAF/MDAF.py
@@ -219,7 +219,10 @@ def representfunc(funcpath, forced = False):
 
 
 def doe(heuristicpath, testfunctionpaths, args):
-    for i,path in enumerate(testfunctionpaths): if (path.find('@') == 0): testfunctionpaths[i] = path.dirname(__file__) + '/TestFunctions/' + testfunctionpaths[1:]
+    for i,path in enumerate(testfunctionpaths):
+        if path.find('@') == 0:
+            testfunctionpaths[i] = path.dirname(__file__) + '/TestFunctions/' + testfunctionpaths[1:]
+
     if (heuristicpath.find('@') == 0): heuristicpath = path.dirname(__file__) + '/TestFunctions/' + heuristicpath[1:]
 
     #defining the function's name