diff --git a/projects/llvm_libcxx/build.sh b/projects/llvm_libcxx/build.sh
index e16a64ddc..56130d3fb 100755
--- a/projects/llvm_libcxx/build.sh
+++ b/projects/llvm_libcxx/build.sh
@@ -31,6 +31,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
 }
 EOF
   $CXX $CXXFLAGS -std=c++11 ${f}_fuzzer.cc ./libcxx/fuzzing/fuzzing.cpp \
-      -cxx-isystem ./libcxx/include -iquote ./libcxx \
+      -nostdinc++ -cxx-isystem ./libcxx/include -iquote ./libcxx \
       -o $OUT/$f $LIB_FUZZING_ENGINE
 done