diff --git a/examples/lua_basic/main.c b/examples/lua_basic/main.c
index 5d71fbca9fed7..ba1ba378259d3 100644
--- a/examples/lua_basic/main.c
+++ b/examples/lua_basic/main.c
@@ -27,7 +27,11 @@
 
 #include "blob/main.lua.h"
 
+#if (__SIZEOF_POINTER__ == 8)
+#define LUA_MEM_SIZE (22000)
+#else
 #define LUA_MEM_SIZE (11000)
+#endif
 static char lua_mem[LUA_MEM_SIZE] __attribute__ ((aligned(__BIGGEST_ALIGNMENT__)));
 
 int lua_run_script(const uint8_t *buffer, size_t buffer_len)
diff --git a/tests/pkg/lua_loader/main.c b/tests/pkg/lua_loader/main.c
index 41f51e6264f1d..889546bcc44f2 100644
--- a/tests/pkg/lua_loader/main.c
+++ b/tests/pkg/lua_loader/main.c
@@ -69,7 +69,11 @@ const size_t lua_riot_builtin_lua_table_len =
 const size_t lua_riot_builtin_c_table_len =
     ARRAY_SIZE(_lua_riot_builtin_c_table);
 
+#if (__SIZEOF_POINTER__ == 8)
+#define LUA_MEM_SIZE (22000)
+#else
 #define LUA_MEM_SIZE (11000)
+#endif
 static char lua_mem[LUA_MEM_SIZE] __attribute__ ((aligned(__BIGGEST_ALIGNMENT__)));
 
 #define LINEBUF_SZ (32)