diff --git a/src/subprocess.zig b/src/subprocess.zig
index 489297a..69e7daf 100644
--- a/src/subprocess.zig
+++ b/src/subprocess.zig
@@ -49,7 +49,6 @@ pub fn writer(self: *Self, buffer: []u8) Writer {
 
 fn drain(w: *std.Io.Writer, data_: []const []const u8, splat: usize) std.Io.Writer.Error!usize {
     const writer_: *Self.Writer = @alignCast(@fieldParentPtr("interface", w));
-    std.debug.assert(splat == 0);
     if (data_.len == 0) return 0;
     var written: usize = 0;
     for (data_[0 .. data_.len - 1]) |bytes| {