diff --git a/src/cmd_fetch.zig b/src/cmd_fetch.zig
index a6b80662842e64a5ad18d7d422cb5592d4b21a69..6fb09c25a49caba30e35bbcd0866479e8139ff52 100644
--- a/src/cmd_fetch.zig
+++ b/src/cmd_fetch.zig
@@ -184,7 +184,7 @@ fn print_csrc_flags_to(w: fs.File.Writer, list: []u.Module) !void {
         if (mod.is_sys_lib) {
             continue;
         }
-        if (mod.c_source_flags.len == 0) {
+        if (mod.c_source_flags.len == 0 and mod.c_source_files.len == 0) {
             continue;
         }
         try w.print("    pub const @\"{s}\" = {s}", .{mod.id, "&.{"});