diff --git a/setup.py b/setup.py
index 8944f5c..939633b 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
         Pybind11Extension(
             "pyvpmr",
             ["src/VPMR.cpp"],
-            include_dirs=["eigen", "eigen/unsupported", "mpreal", "exprtk", "exprtk-custom-types"],
+            include_dirs=["eigen", "eigen/unsupported", "mpreal", "exprtk", "exprtk-custom-types", "usr/include"],
             libraries=["mpfr", "gmp", "tbb"],
             define_macros=[("PYVPMR", 1)],
         ),