diff --git a/src/tools/miri/tests/fail/tail_calls/signature-mismatch-arg.rs b/src/tools/miri/tests/fail/tail_calls/signature-mismatch-arg.rs
index 3264a74d159e3..6df132d325591 100644
--- a/src/tools/miri/tests/fail/tail_calls/signature-mismatch-arg.rs
+++ b/src/tools/miri/tests/fail/tail_calls/signature-mismatch-arg.rs
@@ -3,7 +3,7 @@
 
 fn main() {
     // FIXME(explicit_tail_calls):
-    //   the error should point to `become f(x)`,
+    //   the error should point to `become g(x)`,
     //   but tail calls mess up the backtrace it seems like...
     f(0);
     //~^ error: Undefined Behavior: calling a function with argument of type i32 passing data of type u32