diff --git a/README-SDL.md b/README-SDL.md
index 97011ab2..e3be89de 100644
--- a/README-SDL.md
+++ b/README-SDL.md
@@ -24,6 +24,7 @@ Table of Contents
 * scons - Required to build fceux.
 * libgtk2.0 (optional) - version >= 2.24 recommended
 * libgtk3.0 (optional) - this compiles as of fceux 2.1.6.
+* liblua5.1 (optional)
 * g++ - fceux requires g++ from the gcc.  llvm-clang is known to not compile fceux (patches welcome).
 
 2 - Installation
@@ -63,7 +64,7 @@ GTK3 BoolVariable to 1 in the SConstruct.
 
 5 - LUA Scripting
 -----------------
-FCEUX provides a LUA engine that allows for in-game scripting capabilities.  LUA can be enabled or disabled at build time by adjusting the "LUA" BoolVariable in the SConstruct file.
+FCEUX provides a LUA 5.1 engine that allows for in-game scripting capabilities.  LUA can be enabled or disabled at build time by adjusting the "LUA" BoolVariable in the SConstruct file.
 
 A collection of LUA scripts are provided with the source distribuition in the output directory:
 
diff --git a/SConstruct b/SConstruct
index 80589ae9..115bad1b 100644
--- a/SConstruct
+++ b/SConstruct
@@ -73,6 +73,8 @@ if env['PLATFORM'] == 'win32':
   env.Append(LIBS = ["rpcrt4", "comctl32", "vfw32", "winmm", "ws2_32", "comdlg32", "ole32", "gdi32", "htmlhelp"])
 else:
   conf = Configure(env)
+  if conf.CheckFunc('asprintf'):
+    conf.env.Append(CCFLAGS = "-DHAVE_ASPRINTF")
   assert conf.CheckLibWithHeader('z', 'zlib.h', 'c', 'inflate;', 1), "please install: zlib"
   if not conf.CheckLib('SDL'):
     print 'Did not find libSDL or SDL.lib, exiting!'
@@ -102,7 +104,9 @@ else:
       # If we're POSIX, we use LUA_USE_LINUX since that combines usual lua posix defines with dlfcn calls for dynamic library loading.
       # Should work on any *nix
       env.Append(CCFLAGS = ["-DLUA_USE_LINUX"])
-      if conf.CheckLib('lua'):
+      if conf.CheckLib('lua5.1'):
+        env.Append(LINKFLAGS = ["-ldl", "-llua5.1"])
+      elif conf.CheckLib('lua'):
         env.Append(LINKFLAGS = ["-ldl", "-llua"])
   env.Append(LINKFLAGS=['-Wl,--as-needed'])
   
@@ -113,8 +117,6 @@ else:
       env['LOGO'] = 0
       print 'Did not find libgd, you won\'t be able to create a logo screen for your avis.'
    
-  if conf.CheckFunc('asprintf'):
-    conf.env.Append(CCFLAGS = "-DHAVE_ASPRINTF")
   if env['OPENGL'] and conf.CheckLibWithHeader('GL', 'GL/gl.h', 'c', autoadd=1):
     conf.env.Append(CCFLAGS = "-DOPENGL")
   conf.env.Append(CPPDEFINES = ['PSS_STYLE=1'])