diff --git a/crates/proc-macro-srv/src/abis/abi_sysroot/ra_server.rs b/crates/proc-macro-srv/src/abis/abi_sysroot/ra_server.rs
index e46d51f7b0..a9cd8e705a 100644
--- a/crates/proc-macro-srv/src/abis/abi_sysroot/ra_server.rs
+++ b/crates/proc-macro-srv/src/abis/abi_sysroot/ra_server.rs
@@ -298,7 +298,7 @@ impl server::Span for RustAnalyzer {
         // FIXME handle span
         span
     }
-    fn position(&mut self, _span: Self::Span) -> Range<u32> {
+    fn byte_range(&mut self, _span: Self::Span) -> Range<usize> {
         // FIXME handle span
         Range { start: 0, end: 0 }
     }