diff --git a/var/spack/repos/builtin/packages/qt/package.py b/var/spack/repos/builtin/packages/qt/package.py
index 4207b3527f9..e9cab85e81d 100644
--- a/var/spack/repos/builtin/packages/qt/package.py
+++ b/var/spack/repos/builtin/packages/qt/package.py
@@ -75,7 +75,7 @@ class Qt(Package):
     # depends_on("flex", type='build')
     # depends_on("bison", type='build')
     # depends_on("ruby", type='build')
-    # depends_on("icu4c")
+    depends_on("icu4c")
 
     # OpenGL hardware acceleration
     depends_on("mesa", when='@4:+mesa')