diff --git a/pci/Cargo.toml b/pci/Cargo.toml
index 95187a793..7176d3f71 100644
--- a/pci/Cargo.toml
+++ b/pci/Cargo.toml
@@ -25,5 +25,5 @@ versionize = "0.1.9"
 versionize_derive = "0.1.4"
 vm-allocator = { path = "../vm-allocator" }
 vm-device = { path = "../vm-device" }
-vm-memory = "0.10.0"
+vm-memory = { version = "0.10.0", features = ["backend-mmap", "backend-atomic", "backend-bitmap"] }
 vm-migration = { path = "../vm-migration" }