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-rw-r--r--ext/mbstring/mbstring.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/mbstring/mbstring.c b/ext/mbstring/mbstring.c
index d8248aac5d..08ac6b9a29 100644
--- a/ext/mbstring/mbstring.c
+++ b/ext/mbstring/mbstring.c
@@ -63,7 +63,7 @@
#if ONIGURUMA_VERSION_INT < 60800
typedef void OnigMatchParam;
#define onig_new_match_param() (NULL)
-#define onig_initialize_match_param(x)
+#define onig_initialize_match_param(x) (void)(x)
#define onig_set_match_stack_limit_size_of_match_param(x, y)
#define onig_free_match_param(x)
#define onig_search_with_param(reg, str, end, start, range, region, option, mp) \