diff --git a/src/factory.c b/src/factory.c
index 083a80aa..5451178c 100644
--- a/src/factory.c
+++ b/src/factory.c
@@ -145,7 +145,16 @@ do { \
 
 const char * Lua_version(void)
 {
-  return LUA_VERSION_MAJOR "." LUA_VERSION_MINOR;
+  // LUA_RELEASE is only available since 5.2+, with format "Lua x.y.z"
+  // The only version information available since Lua 5.0 is LUA_VERSION,
+  // with the format "Lua x.y"
+  #if defined(LUA_RELEASE)
+  return LUA_RELEASE;
+  #elif defined (LUA_VERSION)
+  return LUA_VERSION;
+  #else
+  return "Unknown";
+  #endif
 }
 
 // Updates the screen colors after a running screen has modified the palette.
diff --git a/src/factory.h b/src/factory.h
index ee72f878..6609771d 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -15,4 +15,4 @@ void Run_numbered_script(byte index);
 ///
 /// Returns a string stating the included Lua engine version,
 /// or "Disabled" if Grafx2 is compiled without Lua.
-const char * Lua_version(void);
\ No newline at end of file
+const char * Lua_version(void);