diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog
index 4daba8de04..b8fb48a68b 100644
--- a/cpukit/ChangeLog
+++ b/cpukit/ChangeLog
@@ -1,3 +1,8 @@
+2011-01-19	Joel Sherrill <joel.sherrilL@OARcorp.com>
+
+	* sapi/include/confdefs.h: Account for POSIX threads having a minimum
+	of 2x the minimum stack size.
+
 2010-11-16	Joel Sherrill <joel.sherrilL@OARcorp.com>
 
 	PR 1717/cpukit
diff --git a/cpukit/sapi/include/confdefs.h b/cpukit/sapi/include/confdefs.h
index b6311f5a06..929f72643c 100644
--- a/cpukit/sapi/include/confdefs.h
+++ b/cpukit/sapi/include/confdefs.h
@@ -1294,6 +1294,7 @@ rtems_fs_init_functions_t    rtems_fs_init_helper =
 
   #define CONFIGURE_MEMORY_PER_TASK_FOR_POSIX_API \
     _Configure_From_workspace( \
+      CONFIGURE_MINIMUM_TASK_STACK_SIZE + \
       sizeof (POSIX_API_Control) + \
      (sizeof (void *) * (CONFIGURE_MAXIMUM_POSIX_KEYS)) \
     )