1 files changed, 1 insertions, 0 deletions
diff --git a/iseq.c b/iseq.c
index a1346115e9..367f8b3327 100644
--- a/iseq.c
+++ b/iseq.c
@@ -582,6 +582,7 @@ rb_iseq_compile_with_option(VALUE src, VALUE file, VALUE absolute_path, VALUE li
 	if (RB_TYPE_P((src), T_FILE))
 	    node = rb_parser_compile_file_path(parser, file, src, ln);
 	else {
+	    StringValue(src);
 	    node = rb_parser_compile_string_path(parser, file, src, ln);
 
 	    if (!node) {