diff --git a/src/backtrace/mod.rs b/src/backtrace/mod.rs
index 58f0477..2d3ab8d 100644
--- a/src/backtrace/mod.rs
+++ b/src/backtrace/mod.rs
@@ -129,7 +129,7 @@ with_backtrace! {
     impl Debug for Backtrace {
         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
             if let Some(bt) = self.internal.as_backtrace() {
-                bt.fmt(f)
+                Debug::fmt(bt, f)
             } else { Ok(()) }
         }
     }
@@ -137,7 +137,7 @@ with_backtrace! {
     impl Display for Backtrace {
         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
             if let Some(bt) = self.internal.as_backtrace() {
-                bt.fmt(f)
+                Debug::fmt(bt, f)
             } else { Ok(()) }
         }
     }