diff --git a/packages/core-js/modules/esnext.math.signbit.js b/packages/core-js/modules/esnext.math.signbit.js
index 0d8f4e82bc47..0336d79ec03e 100644
--- a/packages/core-js/modules/esnext.math.signbit.js
+++ b/packages/core-js/modules/esnext.math.signbit.js
@@ -4,6 +4,6 @@ var $ = require('../internals/export');
 // https://github.com/tc39/proposal-Math.signbit
 $({ target: 'Math', stat: true }, {
   signbit: function signbit(x) {
-    return (x = +x) != x ? x : x == 0 ? 1 / x == Infinity : x > 0;
+    return (x = +x) == x && x == 0 ? 1 / x == Infinity : x < 0;
   }
 });