diff --git a/configure b/configure
index b6d35ae515..0848fed3e6 100755
--- a/configure
+++ b/configure
@@ -2499,6 +2499,7 @@ hqdn3d_filter_deps="gpl"
 interlace_filter_deps="gpl"
 kerndeint_filter_deps="gpl"
 ladspa_filter_deps="ladspa dlopen"
+ladspa_filter_extralibs='$ldl'
 mcdeint_filter_deps="avcodec gpl"
 movie_filter_deps="avcodec avformat"
 mp_filter_deps="gpl avcodec swscale inline_asm"