diff --git a/nssa/core/src/program.rs b/nssa/core/src/program.rs
index 035c502f..bb89da6e 100644
--- a/nssa/core/src/program.rs
+++ b/nssa/core/src/program.rs
@@ -161,8 +161,11 @@ pub struct ProgramOutput {
     pub instruction_data: InstructionData,
     /// The account pre states the program received to produce this output.
     pub pre_states: Vec<AccountWithMetadata>,
+    /// The account post states the program execution produced.
     pub post_states: Vec<AccountPostState>,
+    /// The list of chained calls to other programs.
     pub chained_calls: Vec<ChainedCall>,
+    /// The window where the program output is valid.
     pub validity_window: ValidityWindow,
 }