diff --git a/sparsevec.go b/sparsevec.go
index f390e48..9b86e52 100644
--- a/sparsevec.go
+++ b/sparsevec.go
@@ -153,15 +153,16 @@ func (v *SparseVector) DecodeBinary(buf []byte) error {
 	v.dim = int32(dim)
 	v.indices = make([]int32, 0, nnz)
 	v.values = make([]float32, 0, nnz)
+	offset := 12
 
 	for i := 0; i < nnz; i++ {
-		offset := 12 + 4*i
 		v.indices = append(v.indices, int32(binary.BigEndian.Uint32(buf[offset:offset+4])))
+		offset += 4
 	}
 
 	for i := 0; i < nnz; i++ {
-		offset := 12 + 4*nnz + 4*i
 		v.values = append(v.values, math.Float32frombits(binary.BigEndian.Uint32(buf[offset:offset+4])))
+		offset += 4
 	}
 
 	return nil
diff --git a/vector.go b/vector.go
index 44b8d9c..175b793 100644
--- a/vector.go
+++ b/vector.go
@@ -78,9 +78,10 @@ func (v *Vector) DecodeBinary(buf []byte) error {
 	}
 
 	v.vec = make([]float32, 0, dim)
+	offset := 4
 	for i := 0; i < dim; i++ {
-		offset := 4 + 4*i
 		v.vec = append(v.vec, math.Float32frombits(binary.BigEndian.Uint32(buf[offset:offset+4])))
+		offset += 4
 	}
 	return nil
 }