diff --git a/library/core/src/panicking.rs b/library/core/src/panicking.rs
index 3f30038dbc03e..b5150837e6a94 100644
--- a/library/core/src/panicking.rs
+++ b/library/core/src/panicking.rs
@@ -35,7 +35,8 @@ use crate::panic::{Location, PanicInfo};
 #[cfg(feature = "panic_immediate_abort")]
 compile_error!(
     "panic_immediate_abort is now a real panic strategy! \
-    Enable it with the compiler flags `-Zunstable-options -Cpanic=immediate-abort`"
+    Enable it with `panic = \"immediate-abort\"` in Cargo.toml, \
+    or with the compiler flags `-Zunstable-options -Cpanic=immediate-abort`"
 );
 
 // First we define the two main entry points that all panics go through.