diff --git a/datafusion/physical-expr/src/math_expressions.rs b/datafusion/physical-expr/src/math_expressions.rs
index a883c7430d9a..384f8d87eb96 100644
--- a/datafusion/physical-expr/src/math_expressions.rs
+++ b/datafusion/physical-expr/src/math_expressions.rs
@@ -160,7 +160,6 @@ math_unary_function!("atan", atan);
 math_unary_function!("asinh", asinh);
 math_unary_function!("acosh", acosh);
 math_unary_function!("atanh", atanh);
-math_unary_function!("floor", floor);
 math_unary_function!("ceil", ceil);
 math_unary_function!("exp", exp);
 math_unary_function!("ln", ln);