diff --git a/rtl/darwin/pthread.inc b/rtl/darwin/pthread.inc
index e0fe6ffd55..910e9b3f6c 100644
--- a/rtl/darwin/pthread.inc
+++ b/rtl/darwin/pthread.inc
@@ -48,7 +48,7 @@ function  pthread_attr_setinheritsched(p : ppthread_attr_t;i:cint):cint; cdecl;
 function  pthread_attr_setscope      (p : ppthread_attr_t;i:cint):cint;cdecl;external 'c';
 function  pthread_attr_setdetachstate (p : ppthread_attr_t;i:cint):cint;cdecl;external 'c';
 function  pthread_attr_setstacksize(p: ppthread_attr_t; stacksize: size_t):cint;cdecl;external 'c';
-
+function  pthread_attr_destroy     (p:ppthread_attr_t):cint;cdecl;external 'c';
 function  pthread_create ( p: ppthread_t;attr : ppthread_attr_t;f:__startroutine_t;arg:pointer):cint;cdecl;external 'c';
 procedure pthread_exit  ( p: pointer); cdecl;external 'c';
 function  pthread_self:pthread_t; cdecl;external 'c';
diff --git a/rtl/freebsd/pthread.inc b/rtl/freebsd/pthread.inc
index c4bf931174..c7f5af4901 100644
--- a/rtl/freebsd/pthread.inc
+++ b/rtl/freebsd/pthread.inc
@@ -77,12 +77,13 @@ struct sem {
 
 function  pthread_getspecific      (t : pthread_key_t):pointer; cdecl; external;
 function  pthread_setspecific      (t : pthread_key_t;p:pointer):cint; cdecl; external;
-function  pthread_key_create       (p : ppthread_key_t;f: __destr_func_t):cint; cdecl;external;
-function  pthread_attr_init           (p : ppthread_attr_t):cint; cdecl; external;
+function  pthread_key_create         (p : ppthread_key_t;f: __destr_func_t):cint; cdecl;external;
+function  pthread_attr_init          (p : ppthread_attr_t):cint; cdecl; external;
 function  pthread_attr_setinheritsched(p : ppthread_attr_t;i:cint):cint; cdecl; external;
 function  pthread_attr_setscope      (p : ppthread_attr_t;i:cint):cint;cdecl;external;
-function  pthread_attr_setdetachstate (p : ppthread_attr_t;i:cint):cint;cdecl;external;
-function  pthread_attr_setstacksize(p: ppthread_attr_t; stacksize: size_t):cint;cdecl;external;
+function  pthread_attr_setdetachstate(p : ppthread_attr_t;i:cint):cint;cdecl;external;
+function  pthread_attr_setstacksize  (p : ppthread_attr_t; stacksize: size_t):cint;cdecl;external;
+function  pthread_attr_destroy       (p : ppthread_attr_t):cint;cdecl;external;
 function  pthread_create ( p: ppthread_t;attr : ppthread_attr_t;f:__startroutine_t;arg:pointer):cint;cdecl;external;
 procedure pthread_exit  ( p: pointer); cdecl;external;
 function  pthread_self:pthread_t; cdecl;external;
diff --git a/rtl/netbsd/pthread.inc b/rtl/netbsd/pthread.inc
index 56fda509f5..6ef25fb863 100644
--- a/rtl/netbsd/pthread.inc
+++ b/rtl/netbsd/pthread.inc
@@ -48,7 +48,7 @@ function  pthread_attr_setinheritsched(p : ppthread_attr_t;i:cint):cint; cdecl;
 function  pthread_attr_setscope      (p : ppthread_attr_t;i:cint):cint;cdecl;external 'c';
 function  pthread_attr_setdetachstate (p : ppthread_attr_t;i:cint):cint;cdecl;external 'c';
 function  pthread_attr_setstacksize(p: ppthread_attr_t; stacksize: size_t):cint;cdecl;external 'c';
-
+function  pthread_attr_destroy     (p: ppthread_attr_t):cint;cdecl;external 'c';
 function  pthread_create ( p: ppthread_t;attr : ppthread_attr_t;f:__startroutine_t;arg:pointer):cint;cdecl;external 'c';
 procedure pthread_exit  ( p: pointer); cdecl;external 'c';
 function  pthread_self:pthread_t; cdecl;external 'c';
diff --git a/rtl/openbsd/pthread.inc b/rtl/openbsd/pthread.inc
index 3f97168d67..16e670be25 100644
--- a/rtl/openbsd/pthread.inc
+++ b/rtl/openbsd/pthread.inc
@@ -85,6 +85,7 @@ function  pthread_attr_setinheritsched(p : ppthread_attr_t;i:cint):cint; cdecl;
 function  pthread_attr_setscope      (p : ppthread_attr_t;i:cint):cint;cdecl;external;
 function  pthread_attr_setdetachstate (p : ppthread_attr_t;i:cint):cint;cdecl;external;
 function  pthread_attr_setstacksize(p: ppthread_attr_t; stacksize: size_t):cint;cdecl;external;
+function  pthread_attr_destroy(p:ppthread_attr_t):cint;cdecl;external;
 function  pthread_create ( p: ppthread_t;attr : ppthread_attr_t;f:__startroutine_t;arg:pointer):cint;cdecl;external;
 procedure pthread_exit  ( p: pointer); cdecl;external;
 function  pthread_self:pthread_t; cdecl;external;