diff --git a/tools/building.py b/tools/building.py
index 53f6ce2de476ab97a5bdd47eb954f867db0ddb48..ef77d7760f0331949a78cd74c40a46dbca53b0e1 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -609,13 +609,14 @@ def EndBuilding(target):
 
     if GetOption('target') == 'iar':
         IARProject('project.ewp', Projects) 
-import copy
+
 def SrcRemove(src, remove):
-	src_tmp = copy.copy(src)
-	count = 0
-	for i in range(0, len(src_tmp)):
-		s = os.path.basename(str(src_tmp[i]))
-		if s in remove:
-			src.pop(i-count)
-			count = count + 1
-	return src
\ No newline at end of file
+	if type(src[0]) == type('str'):
+		for item in src:
+			if os.path.basename(item) in remove:
+				src.remove(item)
+		return
+
+	for item in src:
+		if os.path.basename(item.rstr()) in remove:
+			src.remove(item)