diff --git a/py/emitnx86.c b/py/emitnx86.c
index d4cd24d74f..5d2bbb267a 100644
--- a/py/emitnx86.c
+++ b/py/emitnx86.c
@@ -1,6 +1,7 @@
 // x86 specific stuff
 
 #include "py/mpconfig.h"
+#include "py/runtime0.h"
 
 #if MICROPY_EMIT_X86