diff --git a/src/main.rs b/src/main.rs
index 7f298ff..a2af880 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -236,7 +236,7 @@ fn real_main(options: Args, config: &mut Config) -> CliResult {
                 );
 
                 // save revision
-                src_uri_extras.push(format!("SRCREV_FORMAT .= \"_{}\"", pkg.name()));
+                src_uri_extras.push(format!("SRCREV_FORMAT .= \":{}\"", pkg.name()));
 
                 let precise = if options.reproducible {
                     src_id.precise()