diff --git a/Custom_EasyBlocks/hypre.py b/Custom_EasyBlocks/hypre.py
index e09f4eaf7edd047aae3bd33cb157a86ea08885a5..495ad6866d276056102ee49eb62a704f34de1e2a 100644
--- a/Custom_EasyBlocks/hypre.py
+++ b/Custom_EasyBlocks/hypre.py
@@ -33,6 +33,7 @@ EasyBuild support for Hypre, implemented as an easyblock
 import os
 
 from easybuild.easyblocks.generic.configuremake import ConfigureMake
+from easybuild.framework.easyconfig import CUSTOM
 from easybuild.tools.build_log import EasyBuildError
 from easybuild.tools.config import build_option
 from easybuild.tools.modules import get_software_root