diff --git a/crates/linker/src/generate_dylib/pe.rs b/crates/linker/src/generate_dylib/pe.rs
index 7f0060c710..791d584388 100644
--- a/crates/linker/src/generate_dylib/pe.rs
+++ b/crates/linker/src/generate_dylib/pe.rs
@@ -1,7 +1,7 @@
 use object::pe;
 use object::LittleEndian as LE;
 
-pub(crate) const APP_DLL: &str = "roc-cheaty-lib.dll";
+pub(crate) const APP_DLL: &str = "libapp.dll";
 
 fn synthetic_image_export_directory(
     name: &str,
diff --git a/crates/linker/src/lib.rs b/crates/linker/src/lib.rs
index a1fc83447e..952682f262 100644
--- a/crates/linker/src/lib.rs
+++ b/crates/linker/src/lib.rs
@@ -55,7 +55,7 @@ pub fn build_and_preprocess_host(
     exported_closure_types: Vec<String>,
 ) {
     let dummy_lib = if let target_lexicon::OperatingSystem::Windows = target.operating_system {
-        host_input_path.with_file_name("libapp.obj")
+        host_input_path.with_file_name("libapp.dll")
     } else {
         host_input_path.with_file_name("libapp.so")
     };
diff --git a/crates/linker/src/pe.rs b/crates/linker/src/pe.rs
index 38f0a232f2..38497692b6 100644
--- a/crates/linker/src/pe.rs
+++ b/crates/linker/src/pe.rs
@@ -1727,14 +1727,14 @@ mod test {
         // make the dummy dylib based on the app object
         let names: Vec<_> = symbols.iter().map(|s| s.name.clone()).collect();
         let dylib_bytes = crate::generate_dylib::synthetic_dll(&names);
-        std::fs::write(dir.join("libapp.obj"), dylib_bytes).unwrap();
+        std::fs::write(dir.join("libapp.dll"), dylib_bytes).unwrap();
 
-        // now we can compile the host (it uses libapp.obj, hence the order here)
+        // now we can compile the host (it uses libapp.dll, hence the order here)
         let output = std::process::Command::new(&zig)
             .current_dir(dir)
             .args(&[
                 "build-exe",
-                "libapp.obj",
+                "libapp.dll",
                 "host.zig",
                 "-lc",
                 "-target",