diff --git a/libmultilabel/linear/linear.py b/libmultilabel/linear/linear.py
index 04d25a21..00c397f3 100644
--- a/libmultilabel/linear/linear.py
+++ b/libmultilabel/linear/linear.py
@@ -258,11 +258,13 @@ def _prepare_options(x: sparse.csr_matrix, options: str) -> tuple[sparse.csr_mat
         # workaround for liblinear warning about unspecified solver
         options_split.extend(["-s", "1"])
 
-    bias = -1.0
+    bias = 1.0
     if "-B" in options_split:
         i = options_split.index("-B")
         bias = float(options_split[i + 1])
         options_split = options_split[:i] + options_split[i + 2 :]
+
+    if bias > 0:
         x = sparse.hstack(
             [
                 x,