diff --git a/configure.ac b/configure.ac
index bbc3863..7d06ba0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,7 +35,7 @@ AM_CONDITIONAL([USE_VALGRIND], [test x$HAVE_VALGRIND = xyes])
 
 AC_CHECK_LIB(m, log10)
 
-PKG_CHECK_MODULES(FFMPEG, [libavformat >= 54.2 libavcodec >= 53.25 libavutil >= 51.18])
+PKG_CHECK_MODULES(FFMPEG, [libavcodec >= 53.25 libavformat >= 53.17 libavutil >= 51.17])
 
 AM_OPTIONS_WXCONFIG
 reqwx=2.8.0
diff --git a/src/spek-audio.cc b/src/spek-audio.cc
index b977edf..d2f4c05 100644
--- a/src/spek-audio.cc
+++ b/src/spek-audio.cc
@@ -213,7 +213,12 @@ AudioFileImpl::~AudioFileImpl()
         av_freep(&this->buffer);
     }
     if (this->frame) {
+        // TODO: Remove this check after Debian switches to libav 9.
+#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(54, 28, 0)
         avcodec_free_frame(&this->frame);
+#else
+        av_freep(&this->frame);
+#endif
     }
     if (this->packet.data) {
         this->packet.data -= this->offset;