diff --git a/Makefile.defs b/Makefile.defs
index 656da3b..f890ed6 100644
--- a/Makefile.defs
+++ b/Makefile.defs
@@ -142,6 +142,13 @@ libcblas.so.3[][64bit] = libatlas
 libf77blas.so.3[][64bit] = libatlas
 libptcblas.so.3[][64bit] = libatlas
 libptf77blas.so.3[][64bit] = libatlas
+# ffmpeg / libav
+libavutil.so.52[][64bit] = libavutil-ffmpeg
+libavutil.so.52[LIBAVUTIL_52][64bit] = libavutil-ffmpeg
+libswscale.so.2[][64bit] = libswscale-ffmpeg
+libswscale.so.2[LIBSWSCALE_2][64bit] = libswscale-ffmpeg
+libpostproc.so.51[][64bit] = libpostproc-ffmpeg
+libpostproc.so.51[LIBPOSTPROC_51][64bit] = libpostproc-ffmpeg
 else
 libGL.so.1 = libGL-Mesa-dri
 libGLU.so.1 = libGL-Mesa-dri
@@ -170,6 +177,13 @@ libcblas.so.3 = libatlas
 libf77blas.so.3 = libatlas
 libptcblas.so.3 = libatlas
 libptf77blas.so.3 = libatlas
+# ffmpeg / libav
+libavutil.so.52 = libavutil-ffmpeg
+libavutil.so.52[LIBAVUTIL_52] = libavutil-ffmpeg
+libswscale.so.2 = libswscale-ffmpeg
+libswscale.so.2[LIBSWSCALE_2] = libswscale-ffmpeg
+libpostproc.so.51 = libpostproc-ffmpeg
+libpostproc.so.51[LIBPOSTPROC_51] = libpostproc-ffmpeg
 endif
 /usr/bin/python = python
 python[abi] = python
@@ -227,9 +241,6 @@ libudev.so.0 = udev
 libgudev-1.0.so.0 = udev
 libexpect5.44.1.15.so = expect
 
-# ffmpeg / libav
-libpostproc.so.51 = libpostproc-ffmpeg
-libpostproc.so.51[LIBPOSTPROC_51] = libpostproc-ffmpeg
 ffmpegpresets := ffmpeg-presets
 
 # libreoffice