diff --git a/plugins/cairo-lang-macro/src/types/conversion.rs b/plugins/cairo-lang-macro/src/types/conversion.rs
index 2e5516d0a..db3520af0 100644
--- a/plugins/cairo-lang-macro/src/types/conversion.rs
+++ b/plugins/cairo-lang-macro/src/types/conversion.rs
@@ -95,7 +95,9 @@ impl TokenStream {
     ///
     /// # Safety
     #[doc(hidden)]
-    pub fn into_stable(self) -> StableTokenStream {
+    pub fn into_stable(mut self) -> StableTokenStream {
+        // Remove 0 bytes so conversion will always work.
+        self.value.retain(|c| c != '\0');
         let cstr = CString::new(self.value).unwrap();
         StableTokenStream {
             value: cstr.into_raw(),