diff --git a/sdk/program/src/instruction.rs b/sdk/program/src/instruction.rs
index 0aef000866..e68fc198a3 100644
--- a/sdk/program/src/instruction.rs
+++ b/sdk/program/src/instruction.rs
@@ -152,7 +152,7 @@ pub enum InstructionError {
     ExecutableDataModified,
 
     /// Executable account's lamports modified
-    #[error("instruction changed the balance of a executable account")]
+    #[error("instruction changed the balance of an executable account")]
     ExecutableLamportChange,
 
     /// Executable accounts must be rent exempt