diff --git a/sys/arm/include/_types.h b/sys/arm/include/_types.h
index de299e9bb680..0871adc778be 100644
--- a/sys/arm/include/_types.h
+++ b/sys/arm/include/_types.h
@@ -109,18 +109,4 @@ typedef	unsigned int	___wchar_t;
 #define	__WCHAR_MIN	0		/* min value for a wchar_t */
 #define	__WCHAR_MAX	__UINT_MAX	/* max value for a wchar_t */
 
-/*
- * Unusual type definitions.
- */
-#ifdef __GNUCLIKE_BUILTIN_VARARGS
-typedef __builtin_va_list	__va_list;	/* internally known to gcc */
-#else
-typedef	char *			__va_list;
-#endif /* __GNUCLIKE_BUILTIN_VARARGS */
-#if defined(__GNUCLIKE_BUILTIN_VAALIST) && !defined(__GNUC_VA_LIST) \
-    && !defined(__NO_GNUC_VA_LIST)
-#define __GNUC_VA_LIST
-typedef __va_list		__gnuc_va_list;	/* compatibility w/GNU headers*/
-#endif
-
 #endif /* !_MACHINE__TYPES_H_ */
diff --git a/sys/arm64/include/_types.h b/sys/arm64/include/_types.h
index f1d4af4ab1d6..1019b3bc7a54 100644
--- a/sys/arm64/include/_types.h
+++ b/sys/arm64/include/_types.h
@@ -95,18 +95,4 @@ typedef	unsigned int	___wchar_t;
 #define	__WCHAR_MIN	0		/* min value for a wchar_t */
 #define	__WCHAR_MAX	__UINT_MAX	/* max value for a wchar_t */
 
-/*
- * Unusual type definitions.
- */
-#ifdef __GNUCLIKE_BUILTIN_VARARGS
-typedef __builtin_va_list	__va_list;	/* internally known to gcc */
-#else
-typedef	char *			__va_list;
-#endif /* __GNUCLIKE_BUILTIN_VARARGS */
-#if defined(__GNUCLIKE_BUILTIN_VAALIST) && !defined(__GNUC_VA_LIST) \
-    && !defined(__NO_GNUC_VA_LIST)
-#define	__GNUC_VA_LIST
-typedef __va_list		__gnuc_va_list;	/* compatibility w/GNU headers*/
-#endif
-
 #endif /* !_MACHINE__TYPES_H_ */
diff --git a/sys/mips/include/_types.h b/sys/mips/include/_types.h
index 1f654c4894f5..31cdb6409353 100644
--- a/sys/mips/include/_types.h
+++ b/sys/mips/include/_types.h
@@ -150,18 +150,4 @@ typedef	int		___wchar_t;
 #define	__WCHAR_MIN	__INT_MIN	/* min value for a wchar_t */
 #define	__WCHAR_MAX	__INT_MAX	/* max value for a wchar_t */
 
-/*
- * Unusual type definitions.
- */
-#ifdef __GNUCLIKE_BUILTIN_VARARGS
-typedef __builtin_va_list	__va_list;	/* internally known to gcc */
-#else
-typedef	char *			__va_list;
-#endif /* __GNUCLIKE_BUILTIN_VARARGS */
-#if defined(__GNUC_VA_LIST_COMPATIBILITY) && !defined(__GNUC_VA_LIST) \
-    && !defined(__NO_GNUC_VA_LIST)
-#define	__GNUC_VA_LIST
-typedef __va_list		__gnuc_va_list;	/* compatibility w/GNU headers*/
-#endif
-
 #endif /* !_MACHINE__TYPES_H_ */
diff --git a/sys/powerpc/include/_types.h b/sys/powerpc/include/_types.h
index 9ed2d8f62a13..83293a60e7d8 100644
--- a/sys/powerpc/include/_types.h
+++ b/sys/powerpc/include/_types.h
@@ -144,24 +144,4 @@ typedef	int		___wchar_t;
 #define	__WCHAR_MIN	__INT_MIN	/* min value for a wchar_t */
 #define	__WCHAR_MAX	__INT_MAX	/* max value for a wchar_t */
 
-/*
- * Unusual type definitions.
- */
-#if defined(__GNUCLIKE_BUILTIN_VARARGS)
-typedef __builtin_va_list	__va_list;	/* internally known to gcc */
-#else
-typedef	struct {
-	char	__gpr;
-	char	__fpr;
-	char	__pad[2];
-	char	*__stack;
-	char	*__base;
-} __va_list;
-#endif /* post GCC 2.95 */
-#if defined(__GNUC_VA_LIST_COMPATIBILITY) && !defined(__GNUC_VA_LIST) \
-    && !defined(__NO_GNUC_VA_LIST)
-#define __GNUC_VA_LIST
-typedef __va_list		__gnuc_va_list;	/* compatibility w/GNU headers*/
-#endif
-
 #endif /* !_MACHINE__TYPES_H_ */
diff --git a/sys/riscv/include/_types.h b/sys/riscv/include/_types.h
index 29e3c6a17427..0c4b6c775ab0 100644
--- a/sys/riscv/include/_types.h
+++ b/sys/riscv/include/_types.h
@@ -95,18 +95,4 @@ typedef	int		___wchar_t;
 #define	__WCHAR_MIN	__INT_MIN	/* min value for a wchar_t */
 #define	__WCHAR_MAX	__INT_MAX	/* max value for a wchar_t */
 
-/*
- * Unusual type definitions.
- */
-#ifdef __GNUCLIKE_BUILTIN_VARARGS
-typedef __builtin_va_list	__va_list;	/* internally known to gcc */
-#else
-typedef	char *			__va_list;
-#endif /* __GNUCLIKE_BUILTIN_VARARGS */
-#if defined(__GNUCLIKE_BUILTIN_VAALIST) && !defined(__GNUC_VA_LIST) \
-    && !defined(__NO_GNUC_VA_LIST)
-#define	__GNUC_VA_LIST
-typedef __va_list		__gnuc_va_list;	/* compatibility w/GNU headers*/
-#endif
-
 #endif /* !_MACHINE__TYPES_H_ */
diff --git a/sys/sparc64/include/_types.h b/sys/sparc64/include/_types.h
index e029cac2455d..bd956b1ac77f 100644
--- a/sys/sparc64/include/_types.h
+++ b/sys/sparc64/include/_types.h
@@ -97,18 +97,4 @@ typedef	int		___wchar_t;
 #define	__WCHAR_MIN	__INT_MIN	/* min value for a wchar_t */
 #define	__WCHAR_MAX	__INT_MAX	/* max value for a wchar_t */
 
-/*
- * Unusual type definitions.
- */
-#ifdef __GNUCLIKE_BUILTIN_VARARGS
-typedef __builtin_va_list	__va_list;	/* internally known to gcc */
-#else
-typedef	char *			__va_list;
-#endif /* __GNUCLIKE_BUILTIN_VARARGS */
-#if defined(__GNUCLIKE_BUILTIN_VAALIST) && !defined(__GNUC_VA_LIST) \
-    && !defined(__NO_GNUC_VA_LIST)
-#define __GNUC_VA_LIST
-typedef __va_list		__gnuc_va_list;	/* compatibility w/GNU headers*/
-#endif
-
 #endif /* !_MACHINE__TYPES_H_ */
diff --git a/sys/sys/_types.h b/sys/sys/_types.h
index 461636dba4f0..8ecf9d059239 100644
--- a/sys/sys/_types.h
+++ b/sys/sys/_types.h
@@ -122,6 +122,21 @@ typedef union {
 
 typedef __uintmax_t     __rman_res_t;
 
+/*
+ * Types for varargs. These are all provided by builtin types these
+ * days, so centralize their definition.
+ */
+#ifdef __GNUCLIKE_BUILTIN_VARARGS
+typedef	__builtin_va_list	__va_list;	/* internally known to gcc */
+#else
+#error "No support for your compiler for stdargs"
+#endif
+#if defined(__GNUC_VA_LIST_COMPATIBILITY) && !defined(__GNUC_VA_LIST) \
+    && !defined(__NO_GNUC_VA_LIST)
+#define __GNUC_VA_LIST
+typedef __va_list		__gnuc_va_list;	/* compatibility w/GNU headers*/
+#endif
+
 /*
  * When the following macro is defined, the system uses 64-bit inode numbers.
  * Programs can use this to avoid including <sys/param.h>, with its associated
diff --git a/sys/x86/include/_types.h b/sys/x86/include/_types.h
index bfcfee98c026..b459951d0efe 100644
--- a/sys/x86/include/_types.h
+++ b/sys/x86/include/_types.h
@@ -143,26 +143,4 @@ typedef	int		___wchar_t;
 #define	__WCHAR_MIN	__INT_MIN	/* min value for a wchar_t */
 #define	__WCHAR_MAX	__INT_MAX	/* max value for a wchar_t */
 
-/*
- * Unusual type definitions.
- */
-#ifdef __GNUCLIKE_BUILTIN_VARARGS
-typedef	__builtin_va_list	__va_list;	/* internally known to gcc */
-#else
-#ifdef __LP64__
-struct __s_va_list {
-	__uint32_t	_pad1[2];	/* gp_offset, fp_offset */
-	__uint64_t	_pad2[2];	/* overflow_arg_area, reg_save_area */
-};
-typedef	struct __s_va_list	__va_list;
-#else
-typedef	char *			__va_list;
-#endif
-#endif
-#if defined(__GNUC_VA_LIST_COMPATIBILITY) && !defined(__GNUC_VA_LIST) \
-    && !defined(__NO_GNUC_VA_LIST)
-#define __GNUC_VA_LIST
-typedef __va_list		__gnuc_va_list;	/* compatibility w/GNU headers*/
-#endif
-
 #endif /* !_MACHINE__TYPES_H_ */