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-rw-r--r--include/mruby/data.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/mruby/data.h b/include/mruby/data.h
index d85edeb3a..54466dcd6 100644
--- a/include/mruby/data.h
+++ b/include/mruby/data.h
@@ -41,7 +41,7 @@ MRB_API struct RData *mrb_data_object_alloc(mrb_state *mrb, struct RClass* klass
#define Data_Make_Struct(mrb,klass,strct,type,sval,data_obj) do { \
(data_obj) = Data_Wrap_Struct(mrb,klass,type,NULL);\
- (sval) = mrb_malloc(mrb, sizeof(strct)); \
+ (sval) = (strct *)mrb_malloc(mrb, sizeof(strct)); \
{ static const strct zero = { 0 }; *(sval) = zero; };\
(data_obj)->data = (sval);\
} while (0)