diff --git a/lib/evm/eei.ts b/lib/evm/eei.ts
index 5457398695..f1be73c5ff 100644
--- a/lib/evm/eei.ts
+++ b/lib/evm/eei.ts
@@ -27,6 +27,9 @@ export interface RunResult {
   logs: any // TODO: define type for Log (each log: [Buffer(address), [Buffer(topic0), ...]])
   returnValue?: Buffer
   gasRefund: BN
+  /**
+   * A map from the accounts that have self-destructed to the addresses to send their funds to
+   */
   selfdestruct: { [k: string]: Buffer }
 }
 
diff --git a/lib/evm/interpreter.ts b/lib/evm/interpreter.ts
index bc0addc8c7..4e379f39a4 100644
--- a/lib/evm/interpreter.ts
+++ b/lib/evm/interpreter.ts
@@ -75,7 +75,7 @@ export interface ExecResult {
    */
   gasRefund?: BN
   /**
-   * A set of accounts that have self-destructed
+   * A map from the accounts that have self-destructed to the addresses to send their funds to
    */
   selfdestruct?: { [k: string]: Buffer }
 }