diff --git a/benchmarks/src/jvmMain/kotlin/space/kscience/kmath/benchmarks/BigIntBenchmark.kt b/benchmarks/src/jvmMain/kotlin/space/kscience/kmath/benchmarks/BigIntBenchmark.kt
index 639eaacf3..d3262379f 100644
--- a/benchmarks/src/jvmMain/kotlin/space/kscience/kmath/benchmarks/BigIntBenchmark.kt
+++ b/benchmarks/src/jvmMain/kotlin/space/kscience/kmath/benchmarks/BigIntBenchmark.kt
@@ -32,6 +32,16 @@ internal class BigIntBenchmark {
         blackhole.consume(jvmNumber + jvmNumber + jvmNumber)
     }
 
+    @Benchmark
+    fun kmAddLarge(blackhole: Blackhole) = BigIntField {
+        blackhole.consume(largeKmNumber + largeKmNumber + largeKmNumber)
+    }
+
+    @Benchmark
+    fun jvmAddLarge(blackhole: Blackhole) = JBigIntegerField {
+        blackhole.consume(largeJvmNumber + largeJvmNumber + largeJvmNumber)
+    }
+
     @Benchmark
     fun kmMultiply(blackhole: Blackhole) = BigIntField {
         blackhole.consume(kmNumber * kmNumber * kmNumber)
diff --git a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/BigInt.kt b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/BigInt.kt
index be73e274a..605dfd265 100644
--- a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/BigInt.kt
+++ b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/BigInt.kt
@@ -281,7 +281,7 @@ public class BigInt internal constructor(
                 }
 
                 result[i] = (res and BASE).toUInt()
-                carry = (res shr BASE_SIZE)
+                carry = res shr BASE_SIZE
             }
 
             result[resultLength - 1] = carry.toUInt()