diff --git a/clinica/pipelines/machine_learning_spatial_svm/spatial_svm_pipeline.py b/clinica/pipelines/machine_learning_spatial_svm/spatial_svm_pipeline.py
index 524888189..f005c6aab 100644
--- a/clinica/pipelines/machine_learning_spatial_svm/spatial_svm_pipeline.py
+++ b/clinica/pipelines/machine_learning_spatial_svm/spatial_svm_pipeline.py
@@ -86,7 +86,7 @@ def _build_input_node(self):
                     Path("t1")
                     / "spm"
                     / "dartel"
-                    / str(self.group_id),
+                    / str(self.group_id)
                     / "*_T1w_segm-graymatter_space-Ixi549Space_modulated-on_probability.nii.gz"
                 ),
                 "graymatter tissue segmented in T1w MRI in Ixi549 space",