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-rw-r--r--math.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/math.c b/math.c
index 9e97f3a..23c6210 100644
--- a/math.c
+++ b/math.c
@@ -750,7 +750,7 @@ ruby_tgamma(const double d)
#define tgamma(d) ruby_tgamma(d)
#endif
-#if defined __MINGW32__ || defined __APPLE__
+#if defined _WIN32 || defined __APPLE__
static inline double
ruby_lgamma_r(const double d, int *sign)
{