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-rw-r--r--include/ruby/encoding.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/encoding.h b/include/ruby/encoding.h
index 805209d15a..e807e8a547 100644
--- a/include/ruby/encoding.h
+++ b/include/ruby/encoding.h
@@ -62,7 +62,7 @@ int rb_enc_codelen(int, rb_encoding*);
#define rb_enc_codepoint(p,e,enc) ONIGENC_MBC_TO_CODE(enc,(UChar*)p,(UChar*)e)
/* ptr, ptr, encoding -> prev_char */
-#define rb_enc_prev_char(s,p,enc) onigenc_get_prev_char_head(enc,(UChar*)s,(UChar*)p)
+#define rb_enc_prev_char(s,p,enc) (char *)onigenc_get_prev_char_head(enc,(UChar*)s,(UChar*)p)
#define rb_enc_isascii(c,enc) ONIGENC_IS_CODE_ASCII(c)
#define rb_enc_isalpha(c,enc) ONIGENC_IS_CODE_ALPHA(enc,c)