diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog
index b72c7ce290..18102e9544 100644
--- a/cpukit/ChangeLog
+++ b/cpukit/ChangeLog
@@ -1,3 +1,10 @@
+2010-11-16	Joel Sherrill <joel.sherrilL@OARcorp.com>
+
+	PR 1718/cpukit
+	* sapi/include/confdefs.h: POSIX threads are allocated twice the
+	minimum stack space by default. confdefs.h only accounts for one
+	minimum -- not the 2x factor.
+
 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 87e0cb2bc1..f21aff1c5b 100644
--- a/cpukit/sapi/include/confdefs.h
+++ b/cpukit/sapi/include/confdefs.h
@@ -938,6 +938,7 @@ extern rtems_configuration_table        Configuration;
 
   #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)) \
     )