diff --git a/src/glu/sgi/SConscript b/src/glu/sgi/SConscript
index a0c6c65849f..94c74267fd2 100644
--- a/src/glu/sgi/SConscript
+++ b/src/glu/sgi/SConscript
@@ -11,7 +11,6 @@ env.Prepend(CPPPATH = [
 ])
 
 env.Prepend(CPPDEFINES = [
-    'NDEBUG',
     'LIBRARYBUILD',
     'RESOLVE_3D_TEXTURE_SUPPORT',
 ])