diff --git a/src/ffx/ffx_controller.py b/src/ffx/ffx_controller.py
index 58d2f32..28b52b5 100644
--- a/src/ffx/ffx_controller.py
+++ b/src/ffx/ffx_controller.py
@@ -212,7 +212,7 @@ class FfxController():
             commandSequence += self.generateAudioEncodingTokens()
 
             if self.__context['perform_crop']:
-                commandSequence += FfxController.generateCropTokens()
+                commandSequence += self.generateCropTokens()
 
             commandSequence += self.generateOutputTokens(targetPath,
                                                         targetFormat)
@@ -242,7 +242,7 @@ class FfxController():
             commandSequence += self.generateAudioEncodingTokens()
 
             if self.__context['perform_crop']:
-                commandSequence += FfxController.generateCropTokens()
+                commandSequence += self.generateCropTokens()
 
             commandSequence += self.generateOutputTokens(targetPath,
                                                         targetFormat)