diff --git a/faust-types/src/lib.rs b/faust-types/src/lib.rs
index 7b8f08b..9b17c93 100644
--- a/faust-types/src/lib.rs
+++ b/faust-types/src/lib.rs
@@ -15,8 +15,8 @@ pub type F64 = f64;
 #[derive(Copy, Clone)]
 pub struct ParamIndex(pub i32);
 
-pub struct Soundfile<'a> {
-    fBuffers: &'a &'a F32,
+pub struct Soundfile<'a, T> {
+    fBuffers: &'a &'a T,
     fLength: &'a i32,
     fSR: &'a i32,
     fOffset: &'a i32,