diff --git a/core/lib/minification-estimator.js b/core/lib/minification-estimator.js
index 0ad46cd83526..5cd18f1e71e8 100644
--- a/core/lib/minification-estimator.js
+++ b/core/lib/minification-estimator.js
@@ -6,7 +6,7 @@
 
 // https://www.ecma-international.org/ecma-262/9.0/index.html#sec-punctuators
 // eslint-disable-next-line max-len
-const PUNCTUATOR_REGEX = /(return|case|{|\(|\[|\.\.\.|;|,|<|>|<=|>=|==|!=|===|!==|\+|-|\*|%|\*\*|\+\+|--|<<|>>|>>>|&|\||\^|!|~|&&|\|\||\?|:|=|\+=|-=|\*=|%=|\*\*=|<<=|>>=|>>>=|&=|\|=|\^=|=>|\/|\/=|\})$/;
+const PUNCTUATOR_REGEX = /(return|case|else|{|\(|\[|\.\.\.|;|,|<|>|<=|>=|==|!=|===|!==|\+|-|\*|%|\*\*|\+\+|--|<<|>>|>>>|&|\||\^|!|~|&&|\|\||\?|:|=|\+=|-=|\*=|%=|\*\*=|<<=|>>=|>>>=|&=|\|=|\^=|=>|\/|\/=|\})$/;
 const WHITESPACE_REGEX = /( |\n|\t)+$/;
 
 /**
diff --git a/core/test/lib/minification-estimator-test.js b/core/test/lib/minification-estimator-test.js
index eff3feaf2fc1..0c4134259201 100644
--- a/core/test/lib/minification-estimator-test.js
+++ b/core/test/lib/minification-estimator-test.js
@@ -262,5 +262,11 @@ describe('minification estimator', () => {
       const outerBraces = '{  foo:{bar:`baz ${bam.get({}    )}`}}';
       expect(computeJSTokenLength(outerBraces)).toEqual(outerBraces.length - 6);
     });
+
+    it('should handle else keyword followed by a regex pattern in scripts', () => {
+      const script = '} else/^hello!/.test(n)?(d=element.parseFromString("Hi/Hello there!")';
+      const minified = '}else/^hello!/.test(n)?(d=element.parseFromString("Hi/Hello there!")';
+      expect(computeJSTokenLength(script)).toEqual(minified.length);
+    });
   });
 });