diff --git a/packages/otsdaq-mu2e-crv/package.py b/packages/otsdaq-mu2e-crv/package.py
index ee10299..5582348 100644
--- a/packages/otsdaq-mu2e-crv/package.py
+++ b/packages/otsdaq-mu2e-crv/package.py
@@ -47,6 +47,7 @@ def url_for_version(self, version):
 
     depends_on("otsdaq-mu2e")
     depends_on("cetmodules", type="build")
+    depends_on("root+webgui")
 
     def cmake_args(self):
         args = [