diff --git a/opfunu/name_based/o_func.py b/opfunu/name_based/o_func.py
index 6edeb64..8f83d1f 100644
--- a/opfunu/name_based/o_func.py
+++ b/opfunu/name_based/o_func.py
@@ -53,7 +53,7 @@ def __init__(self, ndim=None, bounds=None):
         super().__init__()
         self.dim_changeable = True
         self.dim_default = 2
-        self.check_ndim_and_bounds(ndim, bounds, np.array([[-5*np.p, 5.*np.pi] for _ in range(self.dim_default)]))
+        self.check_ndim_and_bounds(ndim, bounds, np.array([[-5*np.pi, 5.*np.pi] for _ in range(self.dim_default)]))
         self.b = np.array([1, 1.3, 0.8, -0.4, -1.3, 1.6, -0.2, -0.6, 0.5, 1.4, 1, 1.3, 0.8, -0.4, -1.3, 1.6, -0.2, -0.6, 0.5, 1.4])
         self.f_global = -1.00846728102
         self.x_global = self.b[:self.ndim]