diff --git a/roaring/roaring.go b/roaring/roaring.go
index 53c07e347..046f97d4a 100644
--- a/roaring/roaring.go
+++ b/roaring/roaring.go
@@ -2122,6 +2122,9 @@ func intersectBitmapBitmap(a, b *container) *container {
 		output.n += int(popcount(v))
 
 	}
+	if output.n < ArrayMaxSize {
+		output.bitmapToArray()
+	}
 	return output
 }