diff --git a/cinelerra-5.1/configure.ac b/cinelerra-5.1/configure.ac
index dcfd41d..9cf291a 100644
--- a/cinelerra-5.1/configure.ac
+++ b/cinelerra-5.1/configure.ac
@@ -265,7 +265,7 @@ PKG_3RD([libvorbis],[auto],
     lib/.libs/libvorbisfile.a ],
   [ include . ])
 
-PKG_3RD([mjpegtools],[yes],
+PKG_3RD([mjpegtools],[yes],
   [mjpegtools-2.1.0],
   [ utils/mmxsse/.libs/libmmxsse.a \
     utils/.libs/libmjpegutils.a \
@@ -313,7 +313,7 @@ PKG_3RD([x265],[auto],
   [ libx265.a ],
   [ . source ])
 
-PKG_3RD([libvpx],[auto],
+PKG_3RD([libvpx],[yes],
   [libvpx-1.8.2],
   [ libvpx.a ],
   [ . ])