diff --git a/lib/libc_r/uthread/pthread_private.h b/lib/libc_r/uthread/pthread_private.h
index e73f4f16381b..2d7e723bbfa1 100644
--- a/lib/libc_r/uthread/pthread_private.h
+++ b/lib/libc_r/uthread/pthread_private.h
@@ -447,7 +447,7 @@ struct pthread {
 	int		signo;
 
 	/* Miscellaneous data. */
-	char		flags;
+	int 		flags;
 #define PTHREAD_EXITING		0x0100
 	char		pthread_priority;
 	void		*ret;
diff --git a/lib/libkse/thread/thr_private.h b/lib/libkse/thread/thr_private.h
index e73f4f16381b..2d7e723bbfa1 100644
--- a/lib/libkse/thread/thr_private.h
+++ b/lib/libkse/thread/thr_private.h
@@ -447,7 +447,7 @@ struct pthread {
 	int		signo;
 
 	/* Miscellaneous data. */
-	char		flags;
+	int 		flags;
 #define PTHREAD_EXITING		0x0100
 	char		pthread_priority;
 	void		*ret;
diff --git a/lib/libpthread/thread/thr_private.h b/lib/libpthread/thread/thr_private.h
index e73f4f16381b..2d7e723bbfa1 100644
--- a/lib/libpthread/thread/thr_private.h
+++ b/lib/libpthread/thread/thr_private.h
@@ -447,7 +447,7 @@ struct pthread {
 	int		signo;
 
 	/* Miscellaneous data. */
-	char		flags;
+	int 		flags;
 #define PTHREAD_EXITING		0x0100
 	char		pthread_priority;
 	void		*ret;