diff --git a/src/builder.rs b/src/builder.rs
index ec82853f..e156d33c 100644
--- a/src/builder.rs
+++ b/src/builder.rs
@@ -658,7 +658,7 @@ impl RmContainerOptionsBuilder {
     }
 
     pub fn volumes(&mut self, s: bool) -> &mut RmContainerOptionsBuilder {
-        self.params.insert("f", s.to_string());
+        self.params.insert("v", s.to_string());
         self
     }