1 files changed, 1 insertions, 0 deletions
diff --git a/scons/generic.py b/scons/generic.py
index a9c2244a74..2a085ddece 100644
--- a/scons/generic.py
+++ b/scons/generic.py
@@ -335,6 +335,7 @@ def generate(env):
         if msvc:
             cppdefines += [
                 'VC_EXTRALEAN',
+                '_USE_MATH_DEFINES',
                 '_CRT_SECURE_NO_DEPRECATE',
             ]
         if debug: