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-rw-r--r--Source/Quaternions.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/Quaternions.cpp b/Source/Quaternions.cpp
index bf7f58c..8b3f7df 100644
--- a/Source/Quaternions.cpp
+++ b/Source/Quaternions.cpp
@@ -285,7 +285,7 @@ void Normalise(XYZ *vectory) {
float fast_sqrt (register float arg)
{
-#ifdef MAC
+#ifdef OS9
// Can replace with slower return std::sqrt(arg);
register float result;