1 files changed, 9 insertions, 0 deletions
diff --git a/library/std/src/sys/mod.rs b/library/std/src/sys/mod.rs
index c080c176a2a..3864a5195f3 100644
--- a/library/std/src/sys/mod.rs
+++ b/library/std/src/sys/mod.rs
@@ -76,3 +76,12 @@ cfg_if::cfg_if! {
         pub mod c;
     }
 }
+
+cfg_if::cfg_if! {
+    // Fuchsia components default to full backtrace.
+    if #[cfg(target_os = "fuchsia")] {
+        pub const BACKTRACE_DEFAULT: bool = true;
+    } else {
+        pub const BACKTRACE_DEFAULT: bool = false;
+    }
+}