diff --git a/configure-android b/configure-android
index 9a5872194..5fdab3f5c 100755
--- a/configure-android
+++ b/configure-android
@@ -21,9 +21,8 @@ if test "$*" = "--help" -o "$*" = "-h"; then
   echo "                   android-9. By default, configure will use the"
   echo "                   maximum platform level detected."
   echo "  TARGET_ABI       Optionally specify a single target architecture,"
-  echo "                   e.g. armeabi-v7a, mips, x86. By default, the target"
-  echo "                   architecture is armeabi. Only used when"
-  echo "                   --use-ndk-cflags is specified."
+  echo "                   e.g. armeabi-v7a, arm64-v8a, mips, x86. By default, "
+  echo "                   the target architecture is arm64-v8a."
   echo "  IGNORE_CFLAGS    Optionally specify compilation flags to be ignored."
   echo "                   Each grepped flag that satisfies the criteria will"
   echo "                   be ignored. Default:"
@@ -49,12 +48,7 @@ if test "x$APP_PLATFORM" = "x"; then
 fi
 
 if test "x$TARGET_ABI" = "x"; then
-  # armeabi was removed since NDK r17
-  if [ "${NDK_VER}" -ge "17" ]; then
-    TARGET_ABI="armeabi-v7a"
-  else
-    TARGET_ABI="armeabi"
-  fi
+  TARGET_ABI="arm64-v8a"
   echo "$F: TARGET_ABI not specified, using ${TARGET_ABI}"
 fi
 
diff --git a/configure-iphone b/configure-iphone
index 9e93c8e2b..ae0d38524 100755
--- a/configure-iphone
+++ b/configure-iphone
@@ -18,7 +18,7 @@ if test "$*" = "--help" -o "$*" = "-h"; then
   echo "             to use. By default, the compiler is deduced from the"
   echo "             SDK."
   echo "  ARCH       Optional flags to specify target architecture, e.g."
-  echo "             ARCH=\"-arch armv6\". Default is armv7."
+  echo "             ARCH=\"-arch armv7\". Default is arm64."
   echo "  MIN_IOS    Optional flags to specify minimum supported iOS"
   echo "             versions, e.g. MIN_IOS=\"-miphoneos-version-min=10.0\". "
   echo "             Default is 7.0."
@@ -113,7 +113,7 @@ if test "${CC}" = ""; then
 fi
 
 if test "${ARCH}" = ""; then
-  export ARCH="-arch armv7"
+  export ARCH="-arch arm64"
   echo "$F: ARCH is not specified, choosing ${ARCH}"
 fi
 export ARCH_VAL=`echo ${ARCH} | sed 's/\-arch //' | sed -e 's/^[ \t]*//;s/[ \t]*$//' `