1 files changed, 1 insertions, 0 deletions
diff --git a/scons/gallium.py b/scons/gallium.py
index 6d5b2fccc17..f208c638a0d 100755
--- a/scons/gallium.py
+++ b/scons/gallium.py
@@ -352,6 +352,7 @@ def generate(env):
                 '_DARWIN_C_SOURCE',
                 'GLX_USE_APPLEGL',
                 'GLX_DIRECT_RENDERING',
+                'BUILDING_MESA',
             ]
         else:
             cppdefines += [