diff --git a/cobra/model_building/models.py b/cobra/model_building/models.py
index 3207231..11beda8 100644
--- a/cobra/model_building/models.py
+++ b/cobra/model_building/models.py
@@ -355,7 +355,7 @@ def score_model(self, X: pd.DataFrame) -> np.ndarray:
         """
         # We select predictor columns (self.predictors) here to
         # ensure we have the proper predictors and the proper order!!!
-        return self.linear.predict(X[self.predictors])[:, 1]
+        return self.linear.predict(X[self.predictors])
 
     def evaluate(self, X: pd.DataFrame, y: pd.Series,
                  split: str=None) -> float:
@@ -440,4 +440,3 @@ def _is_valid_dict(self, model_dict: dict) -> bool:
             return False
 
         return True
-