diff --git a/src/lib/isFloat.js b/src/lib/isFloat.js
index e6cced044..643f9729f 100644
--- a/src/lib/isFloat.js
+++ b/src/lib/isFloat.js
@@ -5,7 +5,7 @@ export default function isFloat(str, options) {
   assertString(str);
   options = options || {};
   const float = new RegExp(`^(?:[-+])?(?:[0-9]+)?(?:\\${options.locale ? decimal[options.locale] : '.'}[0-9]*)?(?:[eE][\\+\\-]?(?:[0-9]+))?$`);
-  if (str === '' || str === '.' || str === '-' || str === '+') {
+  if (str === '' || str === '.' || str === ',' || str === '-' || str === '+') {
     return false;
   }
   const value = parseFloat(str.replace(',', '.'));
diff --git a/test/validators.test.js b/test/validators.test.js
index 030765f34..64348cc34 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -4110,6 +4110,7 @@ describe('Validators', () => {
         '  ',
         '',
         '.',
+        ',',
         'foo',
         '20.foo',
         '2020-01-06T14:31:00.135Z',