diff --git a/ruby.c b/ruby.c
index c5d46eddbf..0c81849f6c 100644
--- a/ruby.c
+++ b/ruby.c
@@ -484,7 +484,7 @@ static void
 add_gems(VALUE *req_list, const char *mod)
 {
     VALUE list = *req_list;
-    VALUE gem, ver;
+    VALUE gem;
     const char *v;
 
     if (!list) {