diff --git a/indra/cmake/UI.cmake b/indra/cmake/UI.cmake
index a6dea44a24aa5fcbf370c3b9ccfef441477d6fa8..8da7397813645c4f2c2292a3daa79dfecfe3d96b 100644
--- a/indra/cmake/UI.cmake
+++ b/indra/cmake/UI.cmake
@@ -37,6 +37,7 @@ else (USESYSTEMLIBS)
   include(FindPkgConfig)
     
     set(PKGCONFIG_PACKAGES
+        gdk-3.0
         gtk+-3.0
         x11
         xinerama