diff --git a/src/chain/script.cpp b/src/chain/script.cpp
index 5453ec569f..9a6c2a0b62 100644
--- a/src/chain/script.cpp
+++ b/src/chain/script.cpp
@@ -250,7 +250,7 @@ script script::from_data(reader& source, bool prefix) NOEXCEPT
         source.set_limit(expected);
     }
 
-    operations ops;
+    operations ops{};
     ops.reserve(op_count(source));
     const auto start = source.get_read_position();
 
diff --git a/src/chain/witness.cpp b/src/chain/witness.cpp
index 255024236d..0b3a0ccafd 100644
--- a/src/chain/witness.cpp
+++ b/src/chain/witness.cpp
@@ -172,7 +172,7 @@ static data_chunk read_element(reader& source) NOEXCEPT
 witness witness::from_data(reader& source, bool prefix) NOEXCEPT
 {
     size_t size{};
-    chunk_cptrs stack;
+    chunk_cptrs stack{};
 
     if (prefix)
     {