diff --git a/kmath-core/src/commonMain/kotlin/scientifik/kmath/histogram/FastHistogram.kt b/kmath-core/src/commonMain/kotlin/scientifik/kmath/histogram/FastHistogram.kt
index 5f69f9d12..3852de316 100644
--- a/kmath-core/src/commonMain/kotlin/scientifik/kmath/histogram/FastHistogram.kt
+++ b/kmath-core/src/commonMain/kotlin/scientifik/kmath/histogram/FastHistogram.kt
@@ -17,7 +17,7 @@ class MultivariateBin(override val center: RealVector, val sizes: RealVector, va
         return vector.asSequence().mapIndexed { i, value -> value in (center[i] - sizes[i] / 2)..(center[i] + sizes[i] / 2) }.all { it }
     }
 
-    override val value: Number get() = counter.sum()
+    override val value get() = counter.sum()
     internal operator fun inc() = this.also { counter.increment() }
 
     override val dimension: Int get() = center.size
@@ -51,8 +51,8 @@ class FastHistogram(
             val center = indexArray.mapIndexed { axis, index ->
                 when (index) {
                     0 -> Double.NEGATIVE_INFINITY
-                    actualSizes[axis] -> Double.POSITIVE_INFINITY
-                    else -> lower[axis] + (index - 1) * binSize[axis]
+                    actualSizes[axis] - 1 -> Double.POSITIVE_INFINITY
+                    else -> lower[axis] + (index.toDouble() - 0.5) * binSize[axis]
                 }
             }.toVector()
             MultivariateBin(center, binSize)
diff --git a/kmath-core/src/commonTest/kotlin/scientifik/kmath/histogram/MultivariateHistogramTest.kt b/kmath-core/src/commonTest/kotlin/scientifik/kmath/histogram/MultivariateHistogramTest.kt
index 2fbbbc88d..842a12ae4 100644
--- a/kmath-core/src/commonTest/kotlin/scientifik/kmath/histogram/MultivariateHistogramTest.kt
+++ b/kmath-core/src/commonTest/kotlin/scientifik/kmath/histogram/MultivariateHistogramTest.kt
@@ -14,10 +14,11 @@ class MultivariateHistogramTest {
                 (-1.0..1.0),
                 (-1.0..1.0)
         )
-        histogram.put(0.6, 0.6)
+        histogram.put(0.55, 0.55)
         val bin = histogram.find { it.value.toInt() > 0 }!!
-        assertTrue { bin.contains(Vector.ofReal(0.6, 0.6)) }
-        assertFalse { bin.contains(Vector.ofReal(-0.6, 0.6)) }
+        assertTrue { bin.contains(Vector.ofReal(0.55, 0.55)) }
+        assertTrue { bin.contains(Vector.ofReal(0.6, 0.5)) }
+        assertFalse { bin.contains(Vector.ofReal(-0.55, 0.55)) }
     }
 
     @Test