diff --git a/src/ffmpeg.imageio/CMakeLists.txt b/src/ffmpeg.imageio/CMakeLists.txt
index 5840206..cc52e4c 100644
--- a/src/ffmpeg.imageio/CMakeLists.txt
+++ b/src/ffmpeg.imageio/CMakeLists.txt
@@ -2,9 +2,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # https://github.com/OpenImageIO/oiio
 
-if (FFmpeg_FOUND)
+if (USE_FFMPEG)
+    find_package(FFMPEG REQUIRED)
     add_oiio_plugin (ffmpeginput.cpp
-                     INCLUDE_DIRS ${FFMPEG_INCLUDES}
+                     INCLUDE_DIRS ${FFMPEG_INCLUDE_DIRS}
                      LINK_LIBRARIES ${FFMPEG_LIBRARIES}
                                     ${BZIP2_LIBRARIES}
                      DEFINITIONS "-DUSE_FFMPEG"