diff --git a/monai/metrics/regression.py b/monai/metrics/regression.py
index 9d29654ee3..4c8b8aa71b 100644
--- a/monai/metrics/regression.py
+++ b/monai/metrics/regression.py
@@ -303,7 +303,7 @@ def _compute_metric(self, y_pred: torch.Tensor, y: torch.Tensor) -> torch.Tensor
 
         if self.spatial_dims == 3 and dims != 5:
             raise ValueError(
-                f"y_pred should have 4 dimensions (batch, channel, height, width, depth) when using {self.spatial_dims}"
+                f"y_pred should have 5 dimensions (batch, channel, height, width, depth) when using {self.spatial_dims}"
                 f" spatial dimensions, got {dims}."
             )