diff --git a/src/error.rs b/src/error.rs
index 572439c..0dde22b 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -89,7 +89,7 @@ impl Display for ErrorKind
         use ErrorKind::*;
         match self {
             FirmwareFileIo(None) => write!(f, "failed to read firmware file")?,
-            FirmwareFileIo(Some(filename)) => write!(f, "failed to read firmware file {filename}")?,
+            FirmwareFileIo(Some(filename)) => write!(f, "failed to read firmware file {}", filename)?,
             TooManyDevices => write!(f, "current operation only supports one Black Magic Probe device but more than one device was found")?,
             DeviceNotFound => write!(f, "Black Magic Probe device not found (check connection?)")?,
             DeviceDisconnectDuringOperation => write!(f, "Black Magic Probe device found disconnected")?,
diff --git a/src/main.rs b/src/main.rs
index 5dad65a..a01e146 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -248,7 +248,7 @@ fn main()
     // Unfortunately, we have to do the printing ourselves, as we need to print a note
     // in the event that backtraces are supported but not enabled.
     if let Err(e) = res {
-        print!("Error: {e}");
+        print!("Error: {}", e);
         #[cfg(feature = "backtrace")]
         {
             if e.backtrace.status() == BacktraceStatus::Disabled {