diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3dd1e5d..940f20f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,7 +10,7 @@ jobs:
   test:
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest, ubuntu-24.04-arm]
 
     runs-on: ${{matrix.os}}
 
@@ -29,7 +29,7 @@ jobs:
   test_cross:
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest, ubuntu-24.04-arm]
 
     runs-on: ${{matrix.os}}
 
diff --git a/build/luajit.zig b/build/luajit.zig
index 504f3d3..03bf05a 100644
--- a/build/luajit.zig
+++ b/build/luajit.zig
@@ -127,6 +127,7 @@ pub fn configure(b: *Build, target: Build.ResolvedTarget, optimize: std.builtin.
 
     const buildvm_c_flags: []const []const u8 = switch (target.result.cpu.arch) {
         .aarch64, .aarch64_be => &.{ "-DLUAJIT_TARGET=LUAJIT_ARCH_arm64", "-DLJ_ARCH_HASFPU=1", "-DLJ_ABI_SOFTFP=0" },
+        .x86_64 => &.{ "-DLUAJIT_TARGET=LUAJIT_ARCH_X64" },
         else => &.{},
     };
 
diff --git a/makefile b/makefile
index d796925..d8cc488 100644
--- a/makefile
+++ b/makefile
@@ -19,6 +19,11 @@ test_cross:
 	zig build -Dlang=luajit -Dtarget=aarch64-linux
 	zig build -Dlang=luajit -Dtarget=aarch64-linux-gnu
 
+	zig build -Dlang=lua51 -Dtarget=x86_64-linux
+	zig build -Dlang=lua51 -Dtarget=x86_64-linux-gnu
+	zig build -Dlang=luajit -Dtarget=x86_64-linux
+	zig build -Dlang=luajit -Dtarget=x86_64-linux-gnu
+
 	zig build -Dlang=luajit -Dtarget=aarch64-macos
 
 docs: