--- a/toolkit/library/rust/shared/Cargo.toml
+++ b/toolkit/library/rust/shared/Cargo.toml
@@ -28,17 +28,17 @@ syn = { version = "0.11", features = ["f
 cose-c = { version = "0.1.5" }
 
 [features]
 default = []
 bindgen = ["geckoservo/bindgen"]
 servo = ["geckoservo"]
 quantum_render = ["webrender_bindings"]
 cubeb-remoting = ["cubeb-sys", "audioipc-client", "audioipc-server"]
-cubeb_pulse_rust = ["cubeb-pulse"]
+cubeb_pulse_rust = ["cubeb-sys", "cubeb-pulse"]
 gecko_debug = ["geckoservo/gecko_debug", "nsstring/gecko_debug"]
 simd-accel = ["encoding_c/simd-accel", "encoding_glue/simd-accel"]
 no-static-ideograph-encoder-tables = ["encoding_c/no-static-ideograph-encoder-tables", "encoding_glue/no-static-ideograph-encoder-tables"]
 
 [lib]
 path = "lib.rs"
 test = false
 doctest = false