diff --git a/libaegisub/common/charset_conv.cpp b/libaegisub/common/charset_conv.cpp
index f19090c15..8a5442896 100644
--- a/libaegisub/common/charset_conv.cpp
+++ b/libaegisub/common/charset_conv.cpp
@@ -23,7 +23,6 @@
 #include <boost/range/algorithm.hpp>
 
 #include <libaegisub/charset_conv.h>
-#include <iconv.h>
 
 #include "charset_6937.h"
 
diff --git a/libaegisub/include/libaegisub/charset_conv.h b/libaegisub/include/libaegisub/charset_conv.h
index c283c36ca..806a1197c 100644
--- a/libaegisub/include/libaegisub/charset_conv.h
+++ b/libaegisub/include/libaegisub/charset_conv.h
@@ -23,6 +23,7 @@
 #include <vector>
 
 #include <libaegisub/exception.h>
+#include <iconv.h>
 
 namespace agi {
 	namespace charset {
@@ -34,8 +35,6 @@ DEFINE_EXCEPTION(BufferTooSmall, ConversionFailure);
 DEFINE_EXCEPTION(BadInput, ConversionFailure);
 DEFINE_EXCEPTION(BadOutput, ConversionFailure);
 
-typedef void *iconv_t;
-
 /// RAII handle for iconv
 class Iconv {
 	iconv_t cd;
diff --git a/subprojects/packagefiles/luajit/src/host/meson.build b/subprojects/packagefiles/luajit/src/host/meson.build
index 2cde6b005..0fdc262a3 100644
--- a/subprojects/packagefiles/luajit/src/host/meson.build
+++ b/subprojects/packagefiles/luajit/src/host/meson.build
@@ -10,34 +10,37 @@ endif
 dynasm_dasc = files('../vm_@0@.dasc'.format(dynasm_arch))
 dasm = [minilua, files('../../dynasm/dynasm.lua')]
 
-if cc.get_id() == 'msvc'
-    # the cl.exe preprocessor seemingly removes/expands macros, so hardcode flags
-    dasm += ['-D', 'WIN', '-D', 'JIT', '-D', 'FFI']
-    if host_machine.cpu_family() == 'x86_64'
-        dasm += ['-D', 'P64']
-    endif
-else
-    # BUG: meson does not resolve paths correctly for subprojects
-    hpre = '#include "@0@/../lj_arch.h"'.format(meson.current_source_dir())
+# BUG: meson does not resolve paths correctly for subprojects
+hpre = '#include "@0@/../lj_arch.h"'.format(meson.current_source_dir())
 
-    checkdefs = [
-        ['LJ_LE', '1', ['-D', 'ENDIAN_LE']],
-        ['LJ_ARCH_BITS', '64', ['-D', 'P64']],
-        ['LJ_HASJIT', '1', ['-D', 'JIT']],
-        ['LJ_HASFFI', '1', ['-D', 'FFI']],
-    ]
+checkdefs = [
+    ['LJ_LE', '1', ['-D', 'ENDIAN_LE']],
+    ['LJ_ARCH_BITS', '64', ['-D', 'P64']],
+    ['LJ_HASJIT', '1', ['-D', 'JIT']],
+    ['LJ_HASFFI', '1', ['-D', 'FFI']],
+    ['LJ_DUALNUM', '1', ['-D', 'DUALNUM']],
+    ['LJ_ARCH_HASFPU', '1', ['-D', 'FPU']],
+    ['LJ_ABI_SOFTFP', '0', ['-D', 'HFABI']],
+    ['LJ_NO_UNWIND', '1', ['-D', 'NO_UNWIND']],
+    ['LJ_ABI_PAUTH', '1', ['-D', 'PAUTH']],
+]
 
-    if host_machine.cpu_family() == 'x86'
-        checkdefs += ['__SSE2__', '1', ['-D', 'SSE']]
-    endif
-
-    foreach def: checkdefs
-        if cc.get_define(def[0], prefix: hpre) == def[1]
-            dasm += def[2]
-        endif
-    endforeach
+if host_machine.cpu_family() == 'x86'
+    checkdefs += ['__SSE2__', '1', ['-D', 'SSE']]
 endif
 
+foreach def: checkdefs
+    if cc.get_define(def[0], prefix: hpre) == def[1]
+        dasm += def[2]
+    endif
+endforeach
+
+if host_machine.system() == 'windows'
+  dasm += ['-D', 'WIN']
+endif
+
+dasm += ['-D', 'VER=' + cc.get_define('LJ_ARCH_VERSION', prefix: hpre)]
+
 buildvm_src = files(
     'buildvm.c',
     'buildvm_asm.c',