diff --git a/programs/bpf/benches/bpf_loader.rs b/programs/bpf/benches/bpf_loader.rs
index d9b98988a9..cd1101dbdf 100644
--- a/programs/bpf/benches/bpf_loader.rs
+++ b/programs/bpf/benches/bpf_loader.rs
@@ -133,7 +133,9 @@ fn bench_program_alu(bencher: &mut Bencher) {
 }
 
 #[derive(Debug, Default)]
-pub struct MockInvokeContext {}
+pub struct MockInvokeContext {
+    key: Pubkey,
+}
 impl InvokeContext for MockInvokeContext {
     fn push(&mut self, _key: &Pubkey) -> Result<(), InstructionError> {
         Ok(())
@@ -148,4 +150,7 @@ impl InvokeContext for MockInvokeContext {
     ) -> Result<(), InstructionError> {
         Ok(())
     }
+    fn get_caller(&self) -> Result<&Pubkey, InstructionError> {
+        Ok(&self.key)
+    }
 }