diff --git a/parser/parser/operation.py b/parser/parser/operation.py
index b6fb0e9..c2a1b3b 100644
--- a/parser/parser/operation.py
+++ b/parser/parser/operation.py
@@ -41,7 +41,7 @@ functions: dict[str, FunctionType] = {
     "sqrt": np.sqrt,
     "sum": np.sum,
     "sup": np.max,
-    "tah": np.tanh,
+    "tanh": np.tanh,
     "tan": np.tan,
 }