diff --git a/sys/alpha/include/_types.h b/sys/alpha/include/_types.h
index 4b7249c1dfe..885b2415935 100644
--- a/sys/alpha/include/_types.h
+++ b/sys/alpha/include/_types.h
@@ -55,6 +55,7 @@ typedef	unsigned long		__uint64_t;
  * Standard type definitions.
  */
 typedef	__int32_t	__clock_t;		/* clock()... */
+typedef	unsigned int	__cpumask_t;
 typedef	__int64_t	__critical_t;
 typedef	double		__double_t;
 typedef	float		__float_t;
diff --git a/sys/amd64/include/_types.h b/sys/amd64/include/_types.h
index 446a2d02e53..4a7b6e7edcd 100644
--- a/sys/amd64/include/_types.h
+++ b/sys/amd64/include/_types.h
@@ -55,6 +55,7 @@ typedef	unsigned long		__uint64_t;
  * Standard type definitions.
  */
 typedef	__int32_t	__clock_t;		/* clock()... */
+typedef	unsigned int	__cpumask_t;
 typedef	__int64_t	__critical_t;
 typedef	double		__double_t;
 typedef	double		__float_t;
diff --git a/sys/arm/include/_types.h b/sys/arm/include/_types.h
index f7618352055..3c6cf695ab9 100644
--- a/sys/arm/include/_types.h
+++ b/sys/arm/include/_types.h
@@ -63,6 +63,7 @@ typedef	unsigned long long	__uint64_t;
  * Standard type definitions.
  */
 typedef	__uint32_t	__clock_t;		/* clock()... */
+typedef	unsigned int	__cpumask_t;
 typedef	__int32_t	__critical_t;
 typedef	__int32_t	__intfptr_t;
 typedef	__int64_t	__intmax_t;
diff --git a/sys/i386/include/_types.h b/sys/i386/include/_types.h
index 69f439d891c..aa240d05e10 100644
--- a/sys/i386/include/_types.h
+++ b/sys/i386/include/_types.h
@@ -68,6 +68,7 @@ typedef	unsigned long long	__uint64_t;
  * Standard type definitions.
  */
 typedef	unsigned long	__clock_t;		/* clock()... */
+typedef	unsigned int	__cpumask_t;
 typedef	__int32_t	__critical_t;
 typedef	double		__double_t;
 typedef	double		__float_t;
diff --git a/sys/ia64/include/_types.h b/sys/ia64/include/_types.h
index 9c15ef6576d..5809f630d88 100644
--- a/sys/ia64/include/_types.h
+++ b/sys/ia64/include/_types.h
@@ -55,6 +55,7 @@ typedef	unsigned long		__uint64_t;
  * Standard type definitions.
  */
 typedef	__int32_t	__clock_t;		/* clock()... */
+typedef	unsigned int	__cpumask_t;
 typedef	__int64_t	__critical_t;
 typedef	double		__double_t;
 typedef	float		__float_t;
diff --git a/sys/powerpc/include/_types.h b/sys/powerpc/include/_types.h
index e86ee8d8c46..32fe2e3f1e6 100644
--- a/sys/powerpc/include/_types.h
+++ b/sys/powerpc/include/_types.h
@@ -68,6 +68,7 @@ typedef unsigned long long	__uint64_t;
  * Standard type definitions.
  */
 typedef	__uint32_t	__clock_t;		/* clock()... */
+typedef	unsigned int	__cpumask_t;
 typedef	__int32_t	__critical_t;
 typedef	double		__double_t;
 typedef	double		__float_t;
diff --git a/sys/sparc64/include/_types.h b/sys/sparc64/include/_types.h
index 5c9ceec7e65..688d986c1e8 100644
--- a/sys/sparc64/include/_types.h
+++ b/sys/sparc64/include/_types.h
@@ -55,6 +55,7 @@ typedef	unsigned long		__uint64_t;
  * Standard type definitions.
  */
 typedef	__int32_t	__clock_t;		/* clock()... */
+typedef	unsigned int	__cpumask_t;
 typedef	__int64_t	__critical_t;
 typedef	double		__double_t;
 typedef	float		__float_t;
diff --git a/sys/sys/types.h b/sys/sys/types.h
index d20581ce741..ac31bb7810b 100644
--- a/sys/sys/types.h
+++ b/sys/sys/types.h
@@ -255,6 +255,7 @@ typedef	__vm_size_t	vm_size_t;
 
 #ifdef _KERNEL
 typedef	int		boolean_t;
+typedef	__cpumask_t	cpumask_t;
 typedef	__intfptr_t	intfptr_t;
 
 /*-