diff --git a/src/link/Coff/lld.zig b/src/link/Coff/lld.zig
index 7702062eae3208e92dcf6e05258a080f2b12e798..d705f62f5cc00eda6b2462e42098e85c6358f6c3 100644
--- a/src/link/Coff/lld.zig
+++ b/src/link/Coff/lld.zig
@@ -99,7 +99,7 @@ pub fn linkWithLLD(self: *Coff, comp: *Compilation, prog_node: *std.Progress.Nod
         man.hash.addOptional(self.base.options.major_subsystem_version);
         man.hash.addOptional(self.base.options.minor_subsystem_version);
         man.hash.addOptional(self.base.options.version);
-        man.hash.addOptionalBytes(self.base.options.module_definition_file);
+        try man.addOptionalFile(self.base.options.module_definition_file);
 
         // We don't actually care whether it's a cache hit or miss; we just need the digest and the lock.
         _ = try man.hit();