diff --git a/sdk/program/src/pubkey.rs b/sdk/program/src/pubkey.rs
index 728a5cd252d89f..2f1ccbdcfbfd7e 100644
--- a/sdk/program/src/pubkey.rs
+++ b/sdk/program/src/pubkey.rs
@@ -631,7 +631,7 @@ impl Pubkey {
         }
     }
 
-    pub fn to_bytes(self) -> [u8; 32] {
+    pub const fn to_bytes(self) -> [u8; 32] {
         self.0
     }