diff --git a/src/lang.zig b/src/lang.zig
index 2952525..7c66fa4 100644
--- a/src/lang.zig
+++ b/src/lang.zig
@@ -305,7 +305,7 @@ pub const Lang = struct {
             .Highpass => try self.expectFloat(5, cmd.args),
             .Delay => try self.expectFloat(12, cmd.args),
             .Vinyl => try self.expectFloat(7, cmd.args),
-            .RevDelay => try self.expectFloat(5, cmd.args),
+            .RevDelay => try self.expectFloat(7, cmd.args),
             .Noise => try self.expectFloat(4, cmd.args),
             .WildNoise => try self.expectFloat(4, cmd.args),
             .Write => try self.expectFloat(3, cmd.args),