diff --git a/gcc/function.c b/gcc/function.c
index 0f6805a3976..586fba40b02 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -861,6 +861,7 @@ assign_stack_temp (mode, size, keep)
 					 stack_slot_list);
 
 	      best_p->size = rounded_size;
+	      best_p->full_size = rounded_size;
 	    }
 	}