1 files changed, 1 insertions, 0 deletions
diff --git a/struct.c b/struct.c
index 32ea8f525c..474b267cf2 100644
--- a/struct.c
+++ b/struct.c
@@ -517,6 +517,7 @@ rb_struct_aset(s, idx, val)
     return RSTRUCT(s)->ptr[i] = val;
 }
 
+static VALUE struct_entry _((VALUE, long));
 static VALUE
 struct_entry(s, n)
     VALUE s;