diff --git a/plugin/rt/src/lib.rs b/plugin/rt/src/lib.rs
index f010266708..bf7d4cdd09 100644
--- a/plugin/rt/src/lib.rs
+++ b/plugin/rt/src/lib.rs
@@ -44,6 +44,6 @@ static mut BUFFERS: Vec<u8> = Vec::new();
 /// This function should never be used only intented to by used by the host
 #[no_mangle]
 pub unsafe fn wasm_prepare_buffer(size: i32) -> i32 {
-    BUFFERS = Vec::<u8>::with_capacity(size as usize);
+    BUFFERS = vec![0u8; size as usize];
     BUFFERS.as_ptr() as i32
 }