diff --git a/includes/math-expr.inc b/includes/math-expr.inc
index b4b7fb7..beffb93 100644
--- a/includes/math-expr.inc
+++ b/includes/math-expr.inc
@@ -95,6 +95,7 @@ class ctools_math_expr {
         'sin','sinh','arcsin','asin','arcsinh','asinh',
         'cos','cosh','arccos','acos','arccosh','acosh',
         'tan','tanh','arctan','atan','arctanh','atanh',
+        'pow', 'exp',
         'sqrt','abs','ln','log',
         'time', 'ceil', 'floor', 'min', 'max', 'round');