diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 32cdb16..fa6a1e5 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -25,20 +25,20 @@ requirements:
   host:
     - python
     - setuptools
-    - libtiff
+    - libtiff    # [not win]
     - libpng
     - jpeg
-    - zlib
-    - tbb-devel
+    - zlib       # [not win]
+    - tbb-devel  # [not win]
 
   run:
     - vs2015_runtime  # [win]
     - python
-    - {{ pin_compatible('libtiff', max_pin='x.x') }}
+    - {{ pin_compatible('libtiff', max_pin='x.x') }} # [not win]
     - {{ pin_compatible('libpng', max_pin='x.x') }}
     - {{ pin_compatible('jpeg', max_pin='x') }}
-    - {{ pin_compatible('zlib', max_pin='x.x') }}
-    - tbb
+    - {{ pin_compatible('zlib', max_pin='x.x') }} # [not win]
+    - tbb # [not win]
 
 test:
   imports: