1 files changed, 4 insertions, 2 deletions
diff --git a/gears/SConscript b/gears/SConscript
index 6e5b425..3ba720d 100644
--- a/gears/SConscript
+++ b/gears/SConscript
@@ -112,8 +112,10 @@ env.Replace(
 
 if env['MODE'] == 'dbg':
   env.Append(
-      CPPDEFINES = 'DEBUG=1',
-      CPPDEFINES = '_DEBUG=1',
+      CPPDEFINES = [
+          'DEBUG=1',
+          '_DEBUG=1',
+      ],
       M4FLAGS = '-DDEBUG=1',
   )
 else: