diff --git a/8_1_Building_a_Bitcoin_Script_with_P2SH.md b/8_1_Building_a_Bitcoin_Script_with_P2SH.md
index 767d7d4..9a9c24a 100644
--- a/8_1_Building_a_Bitcoin_Script_with_P2SH.md
+++ b/8_1_Building_a_Bitcoin_Script_with_P2SH.md
@@ -16,6 +16,8 @@ Here's the gotcha for using Bitcoin Scripts: for security reasons, Bitcoin nodes
 
 So how do you write a more complex Bitcoin Script? The answer is in that last sort of standard transaction, the P2SH. You can put any sort of long and complex script into a P2SH transaction, and as long as you follow the standard rules for embedding your script and for redeeming the funds, you'll get all the benefits of Bitcoin Scripting.
 
+> **VERSION WARNING:** Arbitrary (non-standard) P2SH scripts only became standard as of Bitcoin Core 0.10.0. Before that only P2SH Multisigs were allowed.
+
 ## Lock a P2SH Transaction
 
 You already saw a P2SH transaction when you created a multisig in [6.1: Sending a Transaction to a Multisig](6_1_Sending_a_Transaction_to_a_Multisig.md). Though multisig is one of the standard transaction type, `bitcoin-cli` actually simplifies the usage of its multisigs by embedding them into P2SH transactions, as described more fully in the next section.