diff --git a/libOTe/TwoChooseOne/Silent/SilentOtExtReceiver.cpp b/libOTe/TwoChooseOne/Silent/SilentOtExtReceiver.cpp
index b1371735..2d67c926 100644
--- a/libOTe/TwoChooseOne/Silent/SilentOtExtReceiver.cpp
+++ b/libOTe/TwoChooseOne/Silent/SilentOtExtReceiver.cpp
@@ -148,7 +148,7 @@ namespace osuCrypto
 	{
 		MC_BEGIN(task<>, this, &prng, &chl, useOtExtension,
 			choice = sampleBaseChoiceBits(prng),
-			msg = std::vector<block>{},
+			msg = AlignedUnVector<block>{},
 			base = DefaultBaseOT{}
 		);
 
diff --git a/libOTe/TwoChooseOne/Silent/SilentOtExtSender.cpp b/libOTe/TwoChooseOne/Silent/SilentOtExtSender.cpp
index 0b43dbe8..21c63109 100644
--- a/libOTe/TwoChooseOne/Silent/SilentOtExtSender.cpp
+++ b/libOTe/TwoChooseOne/Silent/SilentOtExtSender.cpp
@@ -191,7 +191,7 @@ namespace osuCrypto
     task<> SilentOtExtSender::genSilentBaseOts(PRNG& prng, Socket& chl, bool useOtExtension)
     {
         MC_BEGIN(task<>, this, &prng, &chl, useOtExtension,
-            msg = std::vector<std::array<block, 2>>(silentBaseOtCount()),
+            msg = AlignedUnVector<std::array<block, 2>>(silentBaseOtCount()),
             base = DefaultBaseOT{}
         );
 
diff --git a/libOTe/Vole/Silent/SilentVoleReceiver.cpp b/libOTe/Vole/Silent/SilentVoleReceiver.cpp
index 50254224..aa2d90eb 100644
--- a/libOTe/Vole/Silent/SilentVoleReceiver.cpp
+++ b/libOTe/Vole/Silent/SilentVoleReceiver.cpp
@@ -221,7 +221,7 @@ namespace osuCrypto
 		MC_BEGIN(task<>, this, &prng, &chl,
 			choice = BitVector{},
 			bb = BitVector{},
-			msg = std::vector<block>{},
+			msg = AlignedUnVector<block>{},
 			baseVole = std::vector<block>{},
 			baseOt = DefaultBaseOT{},
 			chl2 = Socket{},
diff --git a/libOTe/Vole/Silent/SilentVoleSender.cpp b/libOTe/Vole/Silent/SilentVoleSender.cpp
index 755aa480..8ffbe566 100644
--- a/libOTe/Vole/Silent/SilentVoleSender.cpp
+++ b/libOTe/Vole/Silent/SilentVoleSender.cpp
@@ -51,7 +51,7 @@ namespace osuCrypto
     task<> SilentVoleSender::genSilentBaseOts(PRNG& prng, Socket& chl, cp::optional<block> delta)
     {
         MC_BEGIN(task<>,this, delta, &prng, &chl, 
-            msg = std::vector<std::array<block, 2>>(silentBaseOtCount()),
+            msg = AlignedUnVector<std::array<block, 2>>(silentBaseOtCount()),
             baseOt = DefaultBaseOT{},
             prng2 = std::move(PRNG{}),
             xx = BitVector{},