diff --git a/lib/libesp32/berry/src/be_byteslib.c b/lib/libesp32/berry/src/be_byteslib.c
index 584914157..b3c63a499 100644
--- a/lib/libesp32/berry/src/be_byteslib.c
+++ b/lib/libesp32/berry/src/be_byteslib.c
@@ -1900,7 +1900,7 @@ void be_load_byteslib(bvm *vm)
         { "copy", m_copy },
         { "append", m_connect },
         { "appendhex", m_appendhex },
-	{ "appendb64", m_appendb64 },
+        { "appendb64", m_appendb64 },
         { "+", m_merge },
         { "..", m_connect },
         { "==", m_equal },