diff --git a/configure b/configure
index 8a805b1d25..87f16e3fe7 100755
--- a/configure
+++ b/configure
@@ -1923,7 +1923,7 @@ pan_filter_deps="swresample"
 removelogo_filter_deps="avcodec avformat swscale"
 scale_filter_deps="swscale"
 smartblur_filter_deps="gpl swscale"
-showspectrum_filter_deps="avcodec"
+showspectrum_filter_deps="avcodec rdft"
 super2xsai_filter_deps="gpl"
 tinterlace_filter_deps="gpl"
 yadif_filter_deps="gpl"