diff --git a/nac3core/build.rs b/nac3core/build.rs
index 281e283..6edcf0b 100644
--- a/nac3core/build.rs
+++ b/nac3core/build.rs
@@ -17,6 +17,7 @@ fn main() {
     const FLAG: &[&str] = &[
         "--target=wasm32",
         FILE,
+        "-fno-discard-value-names",
         "-O3",
         "-emit-llvm",
         "-S",