diff --git a/src/math-buttons.vala b/src/math-buttons.vala
index f75533a..6c4c79f 100644
--- a/src/math-buttons.vala
+++ b/src/math-buttons.vala
@@ -316,7 +316,7 @@ public class MathButtons : Gtk.Box
         /* Tooltip for the exponent button */
         setup_button (builder, "x_pow_y",            "^", _("Exponent [^ or **]"));
         /* Tooltip for the square button */
-        setup_button (builder, "x_squared",          "²", _("Square [Ctrl+2]"));
+        setup_button (builder, "x_squared",          "^2", _("Square [Ctrl+2]"));
         /* Tooltip for the percentage button */
         setup_button (builder, "percentage",         "%", _("Percentage [%]"));
         /* Tooltip for the factorial button */
