diff --git a/sys/x86/include/_stdint.h b/sys/x86/include/_stdint.h
index d9ee3166236b..c3505346cfe5 100644
--- a/sys/x86/include/_stdint.h
+++ b/sys/x86/include/_stdint.h
@@ -40,6 +40,8 @@
 #ifndef _MACHINE__STDINT_H_
 #define	_MACHINE__STDINT_H_
 
+#include <machine/_limits.h>
+
 #if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS)
 
 #define	INT8_C(c)		(c)
@@ -167,8 +169,8 @@
 #define	PTRDIFF_MAX	INT64_MAX
 
 /* Limits of sig_atomic_t. */
-#define	SIG_ATOMIC_MIN	LONG_MIN
-#define	SIG_ATOMIC_MAX	LONG_MAX
+#define	SIG_ATOMIC_MIN	__LONG_MIN
+#define	SIG_ATOMIC_MAX	__LONG_MAX
 
 /* Limit of size_t. */
 #define	SIZE_MAX	UINT64_MAX