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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 7be5115b7e..245cdcfb01 100644
--- a/math.c
+++ b/math.c
@@ -778,7 +778,7 @@ math_erfc(VALUE unused_obj, VALUE x)
return DBL2NUM(erfc(Get_Double(x)));
}
-#if defined __MINGW32__
+#if defined _WIN32
static inline double
ruby_tgamma(const double d)
{