diff --git a/Meta/CMake/Superbuild/CMakeLists.txt b/Meta/CMake/Superbuild/CMakeLists.txt
index cf774748fb5..b9b866ef9ff 100644
--- a/Meta/CMake/Superbuild/CMakeLists.txt
+++ b/Meta/CMake/Superbuild/CMakeLists.txt
@@ -32,7 +32,7 @@ get_filename_component(
     SERENITY_SOURCE_DIR "${PROJECT_SOURCE_DIR}/../../.."
     ABSOLUTE CACHE
 )
-set(SERENITY_ARCH "i686" CACHE STRING "Target architecture for SerenityOS.")
+set(SERENITY_ARCH "x86_64" CACHE STRING "Target architecture for SerenityOS.")
 set(SERENITY_TOOLCHAIN "GNU" CACHE STRING "Compiler toolchain to use for Serenity (GNU or Clang)")
 
 # FIXME: It is preferred to keep all the sub-build artifacts below the binary directory for the superbuild
diff --git a/Meta/analyze-qemu-coverage.sh b/Meta/analyze-qemu-coverage.sh
index 10ee9f1d915..e537fa251a2 100755
--- a/Meta/analyze-qemu-coverage.sh
+++ b/Meta/analyze-qemu-coverage.sh
@@ -5,7 +5,7 @@ set -eo pipefail
 SCRIPT_DIR="$(dirname "${0}")"
 
 if [ -z "$SERENITY_ARCH" ]; then
-    SERENITY_ARCH="i686"
+    SERENITY_ARCH="x86_64"
 fi
 
 toolchain_suffix=
diff --git a/Meta/build-root-filesystem.sh b/Meta/build-root-filesystem.sh
index 851d7ae72e8..71f2193d0f0 100755
--- a/Meta/build-root-filesystem.sh
+++ b/Meta/build-root-filesystem.sh
@@ -41,7 +41,7 @@ else
     chown -R 0:0 mnt/
 fi
 
-SERENITY_ARCH="${SERENITY_ARCH:-i686}"
+SERENITY_ARCH="${SERENITY_ARCH:-x86_64}"
 LLVM_VERSION="${LLVM_VERSION:-14.0.1}"
 
 if [ "$SERENITY_TOOLCHAIN" = "Clang" ]; then
diff --git a/Meta/check-symbols.sh b/Meta/check-symbols.sh
index 8d524c5ed7b..ae36789c58c 100755
--- a/Meta/check-symbols.sh
+++ b/Meta/check-symbols.sh
@@ -9,7 +9,7 @@ cd "$script_path/.." || exit 1
 # To eliminate the need for these symbols, avoid doing non-trivial construction of local statics in LibC.
 
 FORBIDDEN_SYMBOLS="__cxa_guard_acquire __cxa_guard_release"
-TARGET="${SERENITY_ARCH:-"i686"}"
+TARGET="${SERENITY_ARCH:-"x86_64"}"
 LIBC_PATH="Build/${TARGET}/Userland/Libraries/LibC/libc.a"
 for forbidden_symbol in $FORBIDDEN_SYMBOLS; do
     # check if there's an undefined reference to the symbol & it is not defined anywhere else in the library
diff --git a/Meta/debug-kernel.sh b/Meta/debug-kernel.sh
index 897a6feec0e..5ba4ae0d4e2 100755
--- a/Meta/debug-kernel.sh
+++ b/Meta/debug-kernel.sh
@@ -3,7 +3,7 @@
 SCRIPT_DIR="$(dirname "${0}")"
 
 if [ -z "$SERENITY_ARCH" ]; then
-    SERENITY_ARCH="i686"
+    SERENITY_ARCH="x86_64"
 fi
 
 # Set this environment variable to override the default debugger.
@@ -50,10 +50,10 @@ fi
 
 
 exec $SERENITY_KERNEL_DEBUGGER \
-    -ex "file $SCRIPT_DIR/../Build/${SERENITY_ARCH:-i686}$toolchain_suffix/Kernel/Prekernel/$prekernel_image" \
+    -ex "file $SCRIPT_DIR/../Build/${SERENITY_ARCH:-x86_64}$toolchain_suffix/Kernel/Prekernel/$prekernel_image" \
     -ex "set confirm off" \
-    -ex "directory $SCRIPT_DIR/../Build/${SERENITY_ARCH:-i686}$toolchain_suffix/" \
-    -ex "add-symbol-file $SCRIPT_DIR/../Build/${SERENITY_ARCH:-i686}$toolchain_suffix/Kernel/Kernel -o $kernel_base" \
+    -ex "directory $SCRIPT_DIR/../Build/${SERENITY_ARCH:-x86_64}$toolchain_suffix/" \
+    -ex "add-symbol-file $SCRIPT_DIR/../Build/${SERENITY_ARCH:-x86_64}$toolchain_suffix/Kernel/Kernel -o $kernel_base" \
     -ex "set confirm on" \
     -ex "set arch $gdb_arch" \
     -ex "set print frame-arguments none" \
diff --git a/Meta/export-argsparser-manpages.sh b/Meta/export-argsparser-manpages.sh
index 791ce5ba752..8e56804fded 100755
--- a/Meta/export-argsparser-manpages.sh
+++ b/Meta/export-argsparser-manpages.sh
@@ -29,7 +29,7 @@ sudo true
 
 if [ -z "$BUILD_DIR" ]; then
     if [ -z "$SERENITY_ARCH" ]; then
-        export SERENITY_ARCH="i686"
+        export SERENITY_ARCH="x86_64"
         echo "SERENITY_ARCH not given. Assuming ${SERENITY_ARCH}."
     fi
     BUILD_DIR=Build/"$SERENITY_ARCH"
diff --git a/Meta/serenity.sh b/Meta/serenity.sh
index 6260d4df978..1d0e5f356ad 100755
--- a/Meta/serenity.sh
+++ b/Meta/serenity.sh
@@ -91,7 +91,7 @@ fi
 if [ -n "$1" ]; then
     TARGET="$1"; shift
 else
-    TARGET="${SERENITY_ARCH:-"i686"}"
+    TARGET="${SERENITY_ARCH:-"x86_64"}"
 fi
 
 CMAKE_ARGS=()
diff --git a/Ports/.hosted_defs.sh b/Ports/.hosted_defs.sh
index 4a7a5e878c1..ac346fef55b 100644
--- a/Ports/.hosted_defs.sh
+++ b/Ports/.hosted_defs.sh
@@ -2,7 +2,7 @@
 
 SCRIPT="$(dirname "${0}")"
 
-export SERENITY_ARCH="${SERENITY_ARCH:-i686}"
+export SERENITY_ARCH="${SERENITY_ARCH:-x86_64}"
 export SERENITY_TOOLCHAIN="${SERENITY_TOOLCHAIN:-GNU}"
 
 if [ -z "${HOST_CC:=}" ]; then
diff --git a/Toolchain/BuildIt.sh b/Toolchain/BuildIt.sh
index 91e1a3cbfcb..4c9be2884f8 100755
--- a/Toolchain/BuildIt.sh
+++ b/Toolchain/BuildIt.sh
@@ -9,7 +9,7 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 echo "$DIR"
 
-ARCH=${ARCH:-"i686"}
+ARCH=${ARCH:-"x86_64"}
 TARGET="$ARCH-pc-serenity"
 PREFIX="$DIR/Local/$ARCH"
 BUILD="$DIR/../Build/$ARCH"