diff --git a/client_test.go b/client_test.go
index ee5ae7c25..569caa6ba 100644
--- a/client_test.go
+++ b/client_test.go
@@ -14,6 +14,10 @@ func TestClient_Import(t *testing.T) {
 	idx := MustOpenIndex()
 	defer idx.Close()
 
+	// Load bitmap into cache to ensure cache gets updated.
+	f := idx.MustCreateFragmentIfNotExists("d", "f", 0)
+	f.Bitmap(0)
+
 	s := NewServer()
 	defer s.Close()
 	s.Handler.Host = s.Host()
@@ -32,7 +36,6 @@ func TestClient_Import(t *testing.T) {
 	}
 
 	// Verify data.
-	f := idx.MustCreateFragmentIfNotExists("d", "f", 0)
 	if a := f.Bitmap(0).Bits(); !reflect.DeepEqual(a, []uint64{1, 5}) {
 		t.Fatalf("unexpected bits: %+v", a)
 	}
diff --git a/fragment.go b/fragment.go
index 55f80c15c..1770d25c3 100644
--- a/fragment.go
+++ b/fragment.go
@@ -827,8 +827,10 @@ func (f *Fragment) Import(bitmapIDs, profileIDs []uint64) error {
 	// If an error occurs then reopen the storage.
 	if err := func() error {
 		for i := range bitmapIDs {
+			bitmapID, profileID := bitmapIDs[i], profileIDs[i]
+
 			// Determine the position of the bit in the storage.
-			pos, err := f.pos(bitmapIDs[i], profileIDs[i])
+			pos, err := f.pos(bitmapID, profileID)
 			if err != nil {
 				return err
 			}
@@ -837,6 +839,12 @@ func (f *Fragment) Import(bitmapIDs, profileIDs []uint64) error {
 			if _, err := f.storage.Add(pos); err != nil {
 				return err
 			}
+
+			// Invalidate block checksum.
+			delete(f.checksums, int(bitmapID/HashBlockSize))
+
+			// Update the cache.
+			f.bitmap(bitmapID).SetBit(profileID)
 		}
 		return nil
 	}(); err != nil {