diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index 74f50e0f32f..ece8ff0b364 100644
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,3 +1,7 @@
+2017-03-30  Jakub Jelinek  <jakub@redhat.com>
+
+	* env.c (initialize_env): Initialize stacksize to 0.
+
 2017-03-22  Cesar Philippidis  <cesar@codesourcery.com>
 
 	PR c++/80029
diff --git a/libgomp/env.c b/libgomp/env.c
index 74dc6f38530..7c6c02220b6 100644
--- a/libgomp/env.c
+++ b/libgomp/env.c
@@ -1187,7 +1187,7 @@ handle_omp_display_env (unsigned long stacksize, int wait_policy)
 static void __attribute__((constructor))
 initialize_env (void)
 {
-  unsigned long thread_limit_var, stacksize;
+  unsigned long thread_limit_var, stacksize = 0;
   int wait_policy;
 
   /* Do a compile time check that mkomp_h.pl did good job.  */