diff --git a/cryptest.sh b/cryptest.sh
index a80101cd..55c435e6 100755
--- a/cryptest.sh
+++ b/cryptest.sh
@@ -1427,7 +1427,7 @@ if [[ "$HAVE_O3" -ne "0" ]]; then
 	"$MAKE" clean > /dev/null 2>&1
 	rm -f adhoc.cpp > /dev/null 2>&1
 
-	export CXXFLAGS="-DDEBUG $OPT_O3 ${RETAINED_CXXFLAGS[@]}"
+	export CXXFLAGS="-DDEBUG $OPT_O3 -DCRYPTOPP_NO_UNALIGNED_DATA_ACCESS ${RETAINED_CXXFLAGS[@]}"
 	"$MAKE" "${MAKEARGS[@]}" CXX="$CXX" static dynamic cryptest.exe 2>&1 | tee -a "$TEST_RESULTS"
 
 	if [[ ("${PIPESTATUS[0]}" -ne "0") ]]; then
@@ -1454,7 +1454,7 @@ if [[ "$HAVE_O3" -ne "0" ]]; then
 	"$MAKE" clean > /dev/null 2>&1
 	rm -f adhoc.cpp > /dev/null 2>&1
 
-	export CXXFLAGS="-DNDEBUG $OPT_O3 ${RETAINED_CXXFLAGS[@]}"
+	export CXXFLAGS="-DNDEBUG $OPT_O3 -DCRYPTOPP_NO_UNALIGNED_DATA_ACCESS ${RETAINED_CXXFLAGS[@]}"
 	"$MAKE" "${MAKEARGS[@]}" CXX="$CXX" static dynamic cryptest.exe 2>&1 | tee -a "$TEST_RESULTS"
 
 	if [[ ("${PIPESTATUS[0]}" -ne "0") ]]; then
@@ -1486,7 +1486,7 @@ if [[ "$HAVE_O5" -ne "0" ]]; then
 	"$MAKE" clean > /dev/null 2>&1
 	rm -f adhoc.cpp > /dev/null 2>&1
 
-	export CXXFLAGS="-DNDEBUG $OPT_O5 ${RETAINED_CXXFLAGS[@]}"
+	export CXXFLAGS="-DNDEBUG $OPT_O5 -DCRYPTOPP_NO_UNALIGNED_DATA_ACCESS ${RETAINED_CXXFLAGS[@]}"
 	"$MAKE" "${MAKEARGS[@]}" CXX="$CXX" static dynamic cryptest.exe 2>&1 | tee -a "$TEST_RESULTS"
 
 	if [[ ("${PIPESTATUS[0]}" -ne "0") ]]; then
@@ -1513,7 +1513,7 @@ if [[ "$HAVE_O5" -ne "0" ]]; then
 	"$MAKE" clean > /dev/null 2>&1
 	rm -f adhoc.cpp > /dev/null 2>&1
 
-	export CXXFLAGS="-DNDEBUG $OPT_O5 ${RETAINED_CXXFLAGS[@]}"
+	export CXXFLAGS="-DNDEBUG $OPT_O5 -DCRYPTOPP_NO_UNALIGNED_DATA_ACCESS ${RETAINED_CXXFLAGS[@]}"
 	"$MAKE" "${MAKEARGS[@]}" CXX="$CXX" static dynamic cryptest.exe 2>&1 | tee -a "$TEST_RESULTS"
 
 	if [[ ("${PIPESTATUS[0]}" -ne "0") ]]; then