diff --git a/util/ChangeLog b/util/ChangeLog
index d8d586d9b..2dad265ba 100644
--- a/util/ChangeLog
+++ b/util/ChangeLog
@@ -1,3 +1,7 @@
+2003-10-23  Werner Koch  <wk@gnupg.org>
+
+	* secmem.c (lock_pool) [_AIX]: Don't use plock.
+
 2003-07-30  Werner Koch  <wk@gnupg.org>
 
 	* ttyio.c: Typo fixes.
diff --git a/util/secmem.c b/util/secmem.c
index 5ebc7db56..e1ec6c93c 100644
--- a/util/secmem.c
+++ b/util/secmem.c
@@ -130,9 +130,20 @@ lock_pool( void *p, size_t n )
     /* ick. but at least we get secured memory. about to lock
        entire data segment. */
 #ifdef HAVE_PLOCK
+# ifdef _AIX
+    /* The configure for AIX returns broken mlock but the plock has
+       the strange requirement to somehow set the stack limit first.
+       The problem might turn out in indeterministic program behaviour
+       and hanging processes which can somehow be solved when enough
+       processes are clogging up the memory.  To get this problem out
+       of the way we simply don't try to lock the memory at all.
+       */    
+    err = EPERM;
+# else /*!_AIX*/
     err = plock( DATLOCK );
     if( err && errno )
         err = errno;
+# endif /*!_AIX*/
 #else /*!HAVE_PLOCK*/
     if( uid ) {
 	errno = EPERM;