diff --git a/SConstruct b/SConstruct
index ed03465..75c0040 100644
--- a/SConstruct
+++ b/SConstruct
@@ -3,7 +3,9 @@
 import os
 import sys
 
-env = Environment(LIBS = ['GL', 'GLU'])
+env = Environment(LIBS = ['GL', 'GLU'],
+        CFLAGS = ['-Wall'],
+        CXXFLAGS = ['-Wall'])
 env.ParseConfig('sdl-config --cflags --libs')
 
 env.Program('wfobj-view', [Glob('*.cc'), Glob('wfobj/WFObj.cc')])