diff --git a/nipype/interfaces/afni/model.py b/nipype/interfaces/afni/model.py
index 0d56f2dbb5..c17a50c51d 100644
--- a/nipype/interfaces/afni/model.py
+++ b/nipype/interfaces/afni/model.py
@@ -293,11 +293,14 @@ def _list_outputs(self):
             outputs['x1D'] = self._gen_fname(
                 suffix='.xmat.1D', **_gen_fname_opts)
 
+        if isdefined(self.inputs.cbucket):
+            outputs['cbucket'] = os.path.abspath(self.inputs.cbucket)
+
         outputs['reml_script'] = self._gen_fname(
             suffix='.REML_cmd', **_gen_fname_opts)
         # remove out_file from outputs if x1d_stop set to True
         if self.inputs.x1D_stop:
-            del outputs['out_file']
+            del outputs['out_file'], outputs['cbucket']
         else:
             outputs['out_file'] = os.path.abspath(self.inputs.out_file)
 
@@ -652,3 +655,12 @@ class Synthesize(AFNICommand):
     _cmd = '3dSynthesize'
     input_spec = SynthesizeInputSpec
     output_spec = AFNICommandOutputSpec
+
+    def _list_outputs(self):
+        outputs = self.output_spec().get()
+
+        for key in outputs.keys():
+            if isdefined(self.inputs.get()[key]):
+                outputs[key] = os.path.abspath(self.inputs.get()[key])
+
+        return outputs
diff --git a/nipype/interfaces/afni/tests/test_extra_Deconvolve.py b/nipype/interfaces/afni/tests/test_extra_Deconvolve.py
index b80af90cf5..93adc3b748 100644
--- a/nipype/interfaces/afni/tests/test_extra_Deconvolve.py
+++ b/nipype/interfaces/afni/tests/test_extra_Deconvolve.py
@@ -7,4 +7,5 @@ def test_x1dstop():
     deconv.inputs.out_file = 'file.nii'
     assert 'out_file' in deconv._list_outputs()
     deconv.inputs.x1D_stop = True
-    assert not 'out_file' in deconv._list_outputs()
\ No newline at end of file
+    assert 'out_file' not in deconv._list_outputs()
+    assert 'cbucket' not in deconv._list_outputs()