diff --git a/bsp/imxrt1052-evk/SConstruct b/bsp/imxrt1052-evk/SConstruct
index 6017040eed..23d4762514 100644
--- a/bsp/imxrt1052-evk/SConstruct
+++ b/bsp/imxrt1052-evk/SConstruct
@@ -3,10 +3,10 @@ import sys
 import rtconfig
 
 
-#if os.getenv('RTT_ROOT'):
-#    RTT_ROOT = os.getenv('RTT_ROOT')
-#else:
-RTT_ROOT = os.path.normpath(os.getcwd() + '/../..')
+if os.getenv('RTT_ROOT'):
+    RTT_ROOT = os.getenv('RTT_ROOT')
+else:
+	RTT_ROOT = os.path.normpath(os.getcwd() + '/../..')
 	
 sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 from building import *