diff --git a/spack/package.py b/spack/package.py
index 3fdb38b7..718afc8e 100644
--- a/spack/package.py
+++ b/spack/package.py
@@ -28,6 +28,7 @@
     "fortran_api": "MAKE_FTN_API",
     "disable_stat": "DISABLE_STAT",
     "openjpeg": "USE_OPENJPEG",
+    "ipolates": "USE_IPOLATES",
 }