diff --git a/sys/x86/include/_types.h b/sys/x86/include/_types.h
index b130be3d040d..e6d1f6007db2 100644
--- a/sys/x86/include/_types.h
+++ b/sys/x86/include/_types.h
@@ -43,6 +43,8 @@
 #error this file needs sys/cdefs.h as a prerequisite
 #endif
 
+#include <machine/_limits.h>
+
 #define __NO_STRICT_ALIGNMENT
 
 /*