diff --git a/src/main.rs b/src/main.rs
index 1c7b391..5b56c33 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -237,6 +237,7 @@ fn decoder(inputfile: &str, outputfile: &str) -> Result<()> {
                     _ => {
                         md_key.try_push_str(&sline)?;
                         outpng.add_itxt_chunk(split[0].trim_start().to_string(), split[1].trim_start().to_string())?;
+                        md_key.clear();
                     },
                 }
                 continue