diff --git a/mpy-cross/mpconfigport.h b/mpy-cross/mpconfigport.h
index 7ff3d1b6b4..96d3726562 100644
--- a/mpy-cross/mpconfigport.h
+++ b/mpy-cross/mpconfigport.h
@@ -62,7 +62,9 @@
 #define MICROPY_READER_POSIX        (1)
 #define MICROPY_ENABLE_RUNTIME      (0)
 #define MICROPY_ENABLE_GC           (1)
+#ifndef __EMSCRIPTEN__
 #define MICROPY_STACK_CHECK         (1)
+#endif
 #define MICROPY_HELPER_LEXER_UNIX   (1)
 #define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_MPZ)
 #define MICROPY_ENABLE_SOURCE_LINE  (1)