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-rw-r--r--hrtime.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/hrtime.h b/hrtime.h
index bf606d5..f133bdb 100644
--- a/hrtime.h
+++ b/hrtime.h
@@ -64,7 +64,7 @@ rb_hrtime_mul(rb_hrtime_t a, rb_hrtime_t b)
if (__builtin_mul_overflow(a, b, &c))
return RB_HRTIME_MAX;
#else
- if (b != 0 && b > RB_HRTIME_MAX / b) /* overflow */
+ if (b != 0 && a > RB_HRTIME_MAX / b) /* overflow */
return RB_HRTIME_MAX;
c = a * b;
#endif