diff --git a/crates/llvm-context/src/polkavm/context/mod.rs b/crates/llvm-context/src/polkavm/context/mod.rs
index b6196f3..a964cca 100644
--- a/crates/llvm-context/src/polkavm/context/mod.rs
+++ b/crates/llvm-context/src/polkavm/context/mod.rs
@@ -907,7 +907,7 @@ where
                     .copied()
                     .map(inkwell::values::BasicMetadataValueEnum::from)
                     .collect::<Vec<_>>(),
-                &format!("runtime API call {name}"),
+                &format!("runtime_api_{name}_return_value"),
             )
             .unwrap()
             .try_as_basic_value()