1 files changed, 1 insertions, 1 deletions
diff --git a/math.c b/math.c
index 23c6210373..8c16c76c3b 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 _WIN32 || defined __APPLE__
+#if defined __APPLE__
 static inline double
 ruby_lgamma_r(const double d, int *sign)
 {