diff --git a/conda-recipes/main-library/meta.yaml b/conda-recipes/main-library/meta.yaml
index d427bbfe7..c77620714 100755
--- a/conda-recipes/main-library/meta.yaml
+++ b/conda-recipes/main-library/meta.yaml
@@ -28,6 +28,7 @@ requirements:
     - libgl-devel  # [linux]
     - libtiff
     - zlib
+    - expat
 
   run:
     - libstdcxx-ng