diff --git a/src/plugins/multimedia/ffmpeg/CMakeLists.txt b/src/plugins/multimedia/ffmpeg/CMakeLists.txt
index 77c459a..af5229e 100644
--- a/src/plugins/multimedia/ffmpeg/CMakeLists.txt
+++ b/src/plugins/multimedia/ffmpeg/CMakeLists.txt
@@ -273,7 +273,7 @@ if(BUILD_SHARED_LIBS)
 else()
     foreach(ffmpeg_lib IN LISTS ffmpeg_libs)
         qt_internal_add_target_include_dirs(QFFmpegMediaPlugin ${ffmpeg_lib})
-        target_include_directories(QFFmpegMediaPlugin PRIVATE
+        target_compile_definitions(QFFmpegMediaPlugin PRIVATE
             "$<TARGET_PROPERTY:${ffmpeg_lib},INTERFACE_COMPILE_DEFINITIONS>")
     endforeach()
 endif()