diff --git a/lib/libc_r/uthread/pthread_private.h b/lib/libc_r/uthread/pthread_private.h
index 5f0f3a8fd3be..f1a571007bc3 100644
--- a/lib/libc_r/uthread/pthread_private.h
+++ b/lib/libc_r/uthread/pthread_private.h
@@ -217,9 +217,8 @@ struct pthread_attr {
 #define TIMESLICE_USEC				100000
 
 struct pthread_key {
-	pthread_mutex_t mutex;
-	long            access_lock;
-	long            count;
+	volatile long	access_lock;
+	volatile int	allocated;
 	void            (*destructor) ();
 };
 
diff --git a/lib/libkse/thread/thr_private.h b/lib/libkse/thread/thr_private.h
index 5f0f3a8fd3be..f1a571007bc3 100644
--- a/lib/libkse/thread/thr_private.h
+++ b/lib/libkse/thread/thr_private.h
@@ -217,9 +217,8 @@ struct pthread_attr {
 #define TIMESLICE_USEC				100000
 
 struct pthread_key {
-	pthread_mutex_t mutex;
-	long            access_lock;
-	long            count;
+	volatile long	access_lock;
+	volatile int	allocated;
 	void            (*destructor) ();
 };
 
diff --git a/lib/libpthread/thread/thr_private.h b/lib/libpthread/thread/thr_private.h
index 5f0f3a8fd3be..f1a571007bc3 100644
--- a/lib/libpthread/thread/thr_private.h
+++ b/lib/libpthread/thread/thr_private.h
@@ -217,9 +217,8 @@ struct pthread_attr {
 #define TIMESLICE_USEC				100000
 
 struct pthread_key {
-	pthread_mutex_t mutex;
-	long            access_lock;
-	long            count;
+	volatile long	access_lock;
+	volatile int	allocated;
 	void            (*destructor) ();
 };