diff --git a/libgomp/env.c b/libgomp/env.c
index 626a753ca71..f63a36afdd2 100644
--- a/libgomp/env.c
+++ b/libgomp/env.c
@@ -2455,7 +2455,7 @@ initialize_env (void)
       const char *env = getenv ("GOMP_STACKSIZE");
       if (env != NULL
 	  && parse_stacksize ("GOMP_STACKSIZE", env,
-			      (void *[3]) {&none->icvs.stacksize}))
+			      (void *[]) {&none->icvs.stacksize}))
 	gomp_set_icv_flag (&none->flags, GOMP_ICV_STACKSIZE);
     }
   if (none != NULL && gomp_get_icv_flag (none->flags, GOMP_ICV_STACKSIZE))