diff --git a/src/ffx/ffx_controller.py b/src/ffx/ffx_controller.py
index 659e9f1..cf6586d 100644
--- a/src/ffx/ffx_controller.py
+++ b/src/ffx/ffx_controller.py
@@ -110,7 +110,7 @@ class FfxController():
 
     def generateOutputTokens(self, filePathBase, format = '', ext = ''):
 
-        self.__logger.debug(f"FfxController.generateOutputTokens(): base={filePathBase} format={format} ext={ext}")
+        self.__logger.debug(f"FfxController.generateOutputTokens(): base='{filePathBase}' format='{format}' ext='{ext}'")
 
         outputFilePath = f"{filePathBase}{'.'+str(ext) if ext else ''}"
         if format: