diff --git a/scons/llvm.py b/scons/llvm.py
index c1c37362d3c..8388d8e9fc2 100644
--- a/scons/llvm.py
+++ b/scons/llvm.py
@@ -190,6 +190,11 @@ def generate(env):
                 pass
             env.MergeFlags(cppflags)
 
+            # Match llvm --fno-rtti flag
+            cxxflags = env.backtick('llvm-config --cxxflags').split()
+            if '-fno-rtti' in cxxflags:
+                env.Append(CXXFLAGS = ['-fno-rtti'])
+
             components = ['engine', 'bitwriter', 'x86asmprinter']
 
             if llvm_version >= distutils.version.LooseVersion('3.1'):