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-rw-r--r--ext/syck/implicit.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/syck/implicit.c b/ext/syck/implicit.c
index d356faf7d9..cfd5d7b3e6 100644
--- a/ext/syck/implicit.c
+++ b/ext/syck/implicit.c
@@ -1585,7 +1585,7 @@ yy201: ++YYCURSOR;
/* Remove ending fragment and compare types */
int
-syck_tagcmp( char *tag1, char *tag2 )
+syck_tagcmp( const char *tag1, const char *tag2 )
{
if ( tag1 == tag2 ) return 1;
if ( tag1 == NULL || tag2 == NULL ) return 0;