diff --git a/libraries/stdlib/jvm/src/kotlin/collections/builders/MapBuilder.kt b/libraries/stdlib/jvm/src/kotlin/collections/builders/MapBuilder.kt
index 8ebd141d11d..ab91032a273 100644
--- a/libraries/stdlib/jvm/src/kotlin/collections/builders/MapBuilder.kt
+++ b/libraries/stdlib/jvm/src/kotlin/collections/builders/MapBuilder.kt
@@ -196,11 +196,10 @@ internal class MapBuilder<K, V> private constructor(
                 && gaps >= this.capacity / 4                // at least 25% of current capacity is occupied by gaps
     }
 
-    private fun ensureCapacity(capacity: Int) {
-        if (capacity < 0) throw OutOfMemoryError()    // overflow
-        if (capacity > this.capacity) {
-            var newSize = this.capacity * 3 / 2
-            if (capacity > newSize) newSize = capacity
+    private fun ensureCapacity(minCapacity: Int) {
+        if (minCapacity < 0) throw OutOfMemoryError()    // overflow
+        if (minCapacity > this.capacity) {
+            val newSize = AbstractList.newCapacity(this.capacity, minCapacity)
             keysArray = keysArray.copyOfUninitializedElements(newSize)
             valuesArray = valuesArray?.copyOfUninitializedElements(newSize)
             presenceArray = presenceArray.copyOf(newSize)
diff --git a/libraries/stdlib/native-wasm/src/kotlin/collections/HashMap.kt b/libraries/stdlib/native-wasm/src/kotlin/collections/HashMap.kt
index 8c2584577aa..040f85919bd 100644
--- a/libraries/stdlib/native-wasm/src/kotlin/collections/HashMap.kt
+++ b/libraries/stdlib/native-wasm/src/kotlin/collections/HashMap.kt
@@ -193,11 +193,10 @@ actual class HashMap<K, V> private constructor(
                 && gaps >= this.capacity / 4                // at least 25% of current capacity is occupied by gaps
     }
 
-    private fun ensureCapacity(capacity: Int) {
-        if (capacity < 0) throw OutOfMemoryError()    // overflow
-        if (capacity > this.capacity) {
-            var newSize = this.capacity * 3 / 2
-            if (capacity > newSize) newSize = capacity
+    private fun ensureCapacity(minCapacity: Int) {
+        if (minCapacity < 0) throw OutOfMemoryError()    // overflow
+        if (minCapacity > this.capacity) {
+            val newSize = AbstractList.newCapacity(this.capacity, minCapacity)
             keysArray = keysArray.copyOfUninitializedElements(newSize)
             valuesArray = valuesArray?.copyOfUninitializedElements(newSize)
             presenceArray = presenceArray.copyOf(newSize)