diff --git a/OpenImageIO/config.py b/OpenImageIO/config.py
index 311b363ae0..e85a8e28c5 100644
--- a/OpenImageIO/config.py
+++ b/OpenImageIO/config.py
@@ -29,6 +29,8 @@
 			" -D CMAKE_INSTALL_LIBDIR={buildDir}/lib"
 			" -D CMAKE_PREFIX_PATH={buildDir}"
 			" -D USE_FFMPEG=NO"
+			" -D USE_GIF=0"
+			" -D USE_WEBP=0"
 			" -D USE_PYTHON=YES"
 			" -D USE_EXTERNAL_PUGIXML=YES"
 			" -D OIIO_BUILD_TESTS=NO"