diff --git a/src/lib.rs b/src/lib.rs
index 4802003..5324f94 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -183,8 +183,12 @@ use crate::error::Error;
 use crate::version::Version;
 use proc_macro::TokenStream;
 
+#[cfg(not(target_os = "windows"))]
 const RUSTVERSION: Version = include!(concat!(env!("OUT_DIR"), "/version.expr"));
 
+#[cfg(target_os = "windows")]
+const RUSTVERSION: Version = include!(concat!(env!("OUT_DIR"), "\\version.expr"));
+
 #[proc_macro_attribute]
 pub fn stable(args: TokenStream, input: TokenStream) -> TokenStream {
     expand::cfg("stable", args, input)