1 files changed, 4 insertions, 3 deletions
diff --git a/ext/syck/implicit.c b/ext/syck/implicit.c
index 92a31d8006..58abfc9769 100644
--- a/ext/syck/implicit.c
+++ b/ext/syck/implicit.c
@@ -20,7 +20,7 @@
 void
 try_tag_implicit( SyckNode *n, int taguri )
 {
-    char *tid = "";
+    const char *tid = "";
     switch ( n->kind )
     {
         case syck_str_kind:
@@ -44,9 +44,10 @@ try_tag_implicit( SyckNode *n, int taguri )
     }
 }
 
-char *syck_match_implicit( char *str, size_t len )
+const char *
+syck_match_implicit( const char *str, size_t len )
 {
-    char *cursor, *limit, *marker;
+    const char *cursor, *limit, *marker;
     cursor = str;
     limit = str + len;