diff --git a/src/log_impl.rs b/src/log_impl.rs
index edc1e1b..62b482e 100644
--- a/src/log_impl.rs
+++ b/src/log_impl.rs
@@ -567,9 +567,19 @@ macro_rules! std_log_impl {
                         // logging things too.
                         let msg = format!("{}{}", record.args(), self.line_sep);
 
-                        write!(self.stream.lock(), "{}", msg)?;
+                        let result = {
+                            let mut writer = self.stream.lock();
+                            write!(writer, "{}", msg)
+                        };
+
+                        result?;
                     } else {
-                        write!(self.stream.lock(), "{}{}", record.args(), self.line_sep)?;
+                        let result = {
+                            let mut writer = self.stream.lock();
+                            write!(writer, "{}{}", record.args(), self.line_sep)
+                        };
+
+                        result?;
                     }
 
                     Ok(())