diff --git a/dist/gettext.esm.min.js b/dist/gettext.esm.min.js
diff --git a/dist/gettext.iife.js b/dist/gettext.iife.js
@@ -95,9 +95,13 @@ var i18n = (function () {
         // plural forms list available here http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html
         var pf_re = new RegExp('^\\s*nplurals\\s*=\\s*[0-9]+\\s*;\\s*plural\\s*=\\s*(?:\\s|[-\\?\\|&=!<>+*/%:;n0-9_\(\)])+');
 
-        if (!pf_re.test(plural_form))
+        var match = plural_form.match(pf_re);
+
+        if (!match || match[0] !== plural_form)
           throw new Error(strfmt('The plural form "%1" is not valid', plural_form));
 
+        console.log('>>> Plural form:', plural_form);
+
         // Careful here, this is a hidden eval() equivalent..
         // Risk should be reasonable though since we test the plural_form through regex before
         // taken from https://github.com/Orange-OpenSource/gettext.js/blob/master/lib.gettext.js

diff --git a/dist/gettext.iife.min.js b/dist/gettext.iife.min.js
diff --git a/lib/gettext.js b/lib/gettext.js
@@ -92,7 +92,9 @@ var i18n = function (options) {
      // plural forms list available here http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html
      var pf_re = new RegExp('^\\s*nplurals\\s*=\\s*[0-9]+\\s*;\\s*plural\\s*=\\s*(?:\\s|[-\\?\\|&=!<>+*/%:;n0-9_\(\)])+');
 
-     if (!pf_re.test(plural_form))
+     var match = plural_form.match(pf_re);
+
+     if (!match || match[0] !== plural_form)
        throw new Error(strfmt('The plural form "%1" is not valid', plural_form));
 
      // Careful here, this is a hidden eval() equivalent..

diff --git a/tests/tests.js b/tests/tests.js
@@ -206,6 +206,24 @@
                         expect(e.message).to.be('The plural form "nplurals=2; plural=[not valid];" is not valid');
                     }
                 });
+                it('should fail another unvalid plural form', function () {
+                    i18n = new window.i18n({ locale: 'foo' });
+                    i18n.setMessages('messages', 'foo', {
+                        "There is %1 apple": [
+                            "Il y a %1 pomme",
+                            "Il y a %1 pommes"
+                        ]
+                    }, 'nplurals=2; plural=n>1; console.log(`PWNED!`);');
+
+                    // do not throw error on default plural form if key does not have a translation
+                    expect(i18n.ngettext('foo', 'bar', 2)).to.be('bar');
+
+                    try {
+                        i18n.ngettext('There is %1 apple', 'There are %1 apples', 42);
+                    } catch (e) {
+                        expect(e.message).to.be('The plural form "nplurals=2; plural=n>1; console.log(`PWNED!`);" is not valid');
+                    }
+                });
                 it('should handle multiple locale & pluals cohabitation', function () {
                     i18n = new window.i18n({ locale: 'foo' });
                     i18n.setMessages('messages', 'foo', {