diff --git a/src/function/arithmetic/round.js b/src/function/arithmetic/round.js
index 49f7c18183..5065dafcc9 100644
--- a/src/function/arithmetic/round.js
+++ b/src/function/arithmetic/round.js
@@ -136,18 +136,6 @@ export const createRound = /* #__PURE__ */ factory(name, dependencies, ({ typed,
 
     'Array | Matrix, Unit': typed.referToSelf(self => (x, unit) => self(x, 0, unit)),
 
-    'Unit, Array | Matrix, Unit': typed.referToSelf(self => (x, nCollection, unit) => {
-      // deep map collection, skip zeros since round(0) = 0
-      return deepMap(nCollection, (n) => self(x, n, unit), true)
-    }),
-
-    'Unit, number | BigNumber, Array | Matrix': typed.referToSelf(self => (x, n, unitCollection) => {
-      // deep map collection, skip zeros since round(0) = 0
-      return deepMap(unitCollection, (unit) => self(x, n, unit), true)
-    }),
-
-    'Unit, Array | Matrix': typed.referToSelf(self => (x, unitCollection) => self(x, 0, unitCollection)),
-
     'Array | Matrix': typed.referToSelf(self => x => {
       // deep map collection, skip zeros since round(0) = 0
       return deepMap(x, self, true)
diff --git a/test/unit-tests/function/arithmetic/round.test.js b/test/unit-tests/function/arithmetic/round.test.js
index f4520668be..624110cb80 100644
--- a/test/unit-tests/function/arithmetic/round.test.js
+++ b/test/unit-tests/function/arithmetic/round.test.js
@@ -133,13 +133,6 @@ describe('round', function () {
     // first argument is a collection
     assert.deepStrictEqual(round([unit('2 inch'), unit('3 inch')], unit('cm')), [unit('5 cm'), unit('8 cm')])
     assert.deepStrictEqual(round(matrix([unit('2 inch'), unit('3 inch')]), unit('cm')), matrix([unit('5 cm'), unit('8 cm')]))
-
-    // decimals is a collection
-    assert.deepStrictEqual(round(unit('3.12345 cm'), [0, 1, 2], unit('cm')), [unit('3 cm'), unit('3.1 cm'), unit('3.12 cm')])
-
-    // unit is a collection
-    assert.deepStrictEqual(round(unit('3.12345 cm'), [unit('cm'), unit('mm')]), [unit('3 cm'), unit('31 mm')])
-    assert.deepStrictEqual(round(unit('3.12345 cm'), 1, [unit('cm'), unit('mm')]), [unit('3.1 cm'), unit('31.2 mm')])
   })
 
   it('should throw an error if used with a unit without valueless unit', function () {
diff --git a/types/index.d.ts b/types/index.d.ts
index 7ebc8e0f79..9678b6f6d6 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -1104,13 +1104,10 @@ export interface MathJsInstance extends MathJsFactory {
     n?: number | BigNumber
   ): NoLiteralType<T>
   round<U extends MathCollection>(x: MathNumericType, n: U): U
-  round(x: Unit, n: number | BigNumber, unit: Unit): Unit
-  round(x: Unit, unit: Unit): Unit
   round<U extends MathCollection>(x: U, unit: Unit): U
+  round(x: Unit, unit: Unit): Unit
+  round(x: Unit, n: number | BigNumber, unit: Unit): Unit
   round<U extends MathCollection>(x: U, n: number | BigNumber, unit: Unit): U
-  round<U extends MathCollection>(x: Unit, n: U, unit: Unit): U
-  round<U extends MathCollection>(x: Unit, n: number | BigNumber, unit: U): U
-  round<U extends MathCollection>(x: Unit, unit: U): U
 
   // End of group of rounding functions
 
@@ -4751,34 +4748,20 @@ export interface MathJsChain<TValue> {
     this: MathJsChain<MathNumericType | U>,
     n: U
   ): MathJsChain<U>
-  round(
-    this: MathJsChain<Unit>,
-    n: number | BigNumber,
-    unit: Unit
-  ): MathJsChain<Unit>
   round(this: MathJsChain<Unit>, unit: Unit): MathJsChain<Unit>
   round<U extends MathCollection>(
     this: MathJsChain<U>,
     unit: Unit
   ): MathJsChain<U>
-  round<U extends MathCollection>(
-    this: MathJsChain<U>,
-    n: number | BigNumber,
-    unit: Unit
-  ): MathJsChain<U>
-  round<U extends MathCollection>(
+  round(
     this: MathJsChain<Unit>,
-    n: U,
+    n: number | BigNumber,
     unit: Unit
-  ): MathJsChain<U>
+  ): MathJsChain<Unit>
   round<U extends MathCollection>(
-    this: MathJsChain<Unit>,
+    this: MathJsChain<U>,
     n: number | BigNumber,
-    unit: U
-  ): MathJsChain<U>
-  round<U extends MathCollection>(
-    this: MathJsChain<Unit>,
-    unit: U
+    unit: Unit
   ): MathJsChain<U>
 
   // End of rounding group