diff --git a/lbh15/_lbh15.py b/lbh15/_lbh15.py
index f3e3d13..8f185b1 100644
--- a/lbh15/_lbh15.py
+++ b/lbh15/_lbh15.py
@@ -233,8 +233,6 @@ def check_temperature(self, T: float) -> Tuple[bool, str]:
                 to the temperature check
         """
         # Manage acceptable value
-        if np.isnan(T):
-            return True, ""
         if self.T_m0 < T < self.T_b0:
             return True, ""
         # Manage value outside the acceptable range