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-rw-r--r--mrbgems/mruby-sprintf/src/sprintf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mrbgems/mruby-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c
index b849b2263..8d14b0fc5 100644
--- a/mrbgems/mruby-sprintf/src/sprintf.c
+++ b/mrbgems/mruby-sprintf/src/sprintf.c
@@ -17,7 +17,7 @@
#define BIT_DIGITS(N) (((N)*146)/485 + 1) /* log2(10) =~ 146/485 */
#define BITSPERDIG MRB_INT_BIT
-#define EXTENDSIGN(n, l) (((~0 << (n)) >> (((n)*(l)) % BITSPERDIG)) & ~(~0 << (n)))
+#define EXTENDSIGN(n, l) (((~0U << (n)) >> (((n)*(l)) % BITSPERDIG)) & ~(~0U << (n)))
mrb_value mrb_str_format(mrb_state *, int, const mrb_value *, mrb_value);
static void fmt_setup(char*,size_t,int,int,mrb_int,mrb_int);