--- a/ProjectController.py	Tue Mar 04 02:18:11 2014 +0100
+++ b/ProjectController.py	Sun Mar 16 18:39:16 2014 +0100
@@ -668,7 +668,7 @@
         # Keep track of generated C files for later use by self.CTNGenerate_C
         self.PLCGeneratedCFiles = C_files
         # compute CFLAGS for plc
-        self.plcCFLAGS = "-I"+self.ieclib_path
+        self.plcCFLAGS = '"-I%s"'%self.ieclib_path
         return True
 
     def GetBuilder(self):