diff --git a/include/bitcoin/system/crypto/secp256k1_batch.hpp b/include/bitcoin/system/crypto/secp256k1_batch.hpp
index 89b82650a2..73320d3d25 100644
--- a/include/bitcoin/system/crypto/secp256k1_batch.hpp
+++ b/include/bitcoin/system/crypto/secp256k1_batch.hpp
@@ -115,7 +115,7 @@ struct BC_API batch
     batched::tx_link link;
 
     static void scan(const stopper& cancel, const span& batch,
-        const ec_compressed& scan_key, const handler& callback) NOEXCEPT;
+        const ec_secret& scan_key, const handler& callback) NOEXCEPT;
 };
 
 } // namespace silent
diff --git a/src/crypto/secp256k1/batch.cpp b/src/crypto/secp256k1/batch.cpp
index 92893da59e..00a2e9218e 100644
--- a/src/crypto/secp256k1/batch.cpp
+++ b/src/crypto/secp256k1/batch.cpp
@@ -348,7 +348,7 @@ links_t schnorr::batch::verify(const stopper& cancel,
 #if defined(HAVE_ULTRAFAST)
 
 void silent::batch::scan(const stopper& , const span& ,
-    const ec_compressed& , const handler& ) NOEXCEPT
+    const ec_secret& , const handler& ) NOEXCEPT
 {
     // TODO: iterate over chunked subsets or entire set.
     // TODO: correlate matches to tx link column and invoke callback.
@@ -357,7 +357,7 @@ void silent::batch::scan(const stopper& , const span& ,
 #else
 
 void silent::batch::scan(const stopper& , const span& ,
-    const ec_compressed& , const handler& ) NOEXCEPT
+    const ec_secret& , const handler& ) NOEXCEPT
 {
     // TODO: iterate results set in cancellable parallel loop over full space.
     // TODO: correlate matches to tx link and invoke callback.