--- a/build/unix/build-clang/build-clang.py
+++ b/build/unix/build-clang/build-clang.py
@@ -117,7 +117,7 @@
                       "--enable-targets=" + ",".join(targets),
                       "--disable-assertions",
                       "--prefix=%s" % inst_dir,
-                      "--with-gcc-toolchain=/tools/gcc-4.7.2-0moz1"]
+                      "--with-gcc-toolchain=/tools/gcc-4.7.3-0moz1"]
     build_package(llvm_source_dir, build_dir, configure_opts, [])
 
 if __name__ == "__main__":