diff --git a/ChangeLog b/ChangeLog
index 39c0c330..26c88a69 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -21434,3 +21434,5 @@
 2021-04-14 Fred Gleason <fredg@paravelsystems.com>
 	* Documented the 'MeterPortBaseNumber=' and 'MeterPointRange='
 	directives in the rd.conf(5) man page.
+2021-04-15 Fred Gleason <fredg@paravelsystems.com>
+	* Fixed bugs that broke the build when MP4 support was enabled.
diff --git a/lib/rdaudioconvert.cpp b/lib/rdaudioconvert.cpp
index 8919f402..57f345a9 100644
--- a/lib/rdaudioconvert.cpp
+++ b/lib/rdaudioconvert.cpp
@@ -775,7 +775,7 @@ RDAudioConvert::ErrorCode RDAudioConvert::Stage1M4A(const QString &dstfile,
   sf_dst_info.format=SF_FORMAT_WAV|SF_FORMAT_FLOAT;
   sf_dst_info.channels=wave->getChannels();
   sf_dst_info.samplerate=wave->getSamplesPerSec();
-  if((sf_dst=sf_open(dstfile,SFM_WRITE,&sf_dst_info))==NULL) {
+  if((sf_dst=sf_open(dstfile.toUtf8(),SFM_WRITE,&sf_dst_info))==NULL) {
     ret = RDAudioConvert::ErrorNoDestination;
     goto out_mp4_configbuf;
   }
diff --git a/lib/rdwavefile.cpp b/lib/rdwavefile.cpp
index a3ef6250..908094b5 100644
--- a/lib/rdwavefile.cpp
+++ b/lib/rdwavefile.cpp
@@ -339,7 +339,7 @@ bool RDWaveFile::openWave(RDWaveData *data)
       assert(dlmp4.load());
       format_tag=WAVE_FORMAT_M4A;
 
-      MP4FileHandle f = dlmp4.MP4Read(getName());
+      MP4FileHandle f = dlmp4.MP4Read(getName().toUtf8());
       if(f == MP4_INVALID_FILE_HANDLE)
 	return false;
 
@@ -2477,7 +2477,7 @@ bool RDWaveFile::IsM4A(int fd)
 #ifdef HAVE_MP4_LIBS
   if(!dlmp4.load())
     return false;
-  MP4FileHandle f = dlmp4.MP4Read(getName());
+  MP4FileHandle f = dlmp4.MP4Read(getName().toUtf8());
   bool ret = f != MP4_INVALID_FILE_HANDLE;
   if(ret)
     dlmp4.MP4Close(f, 0);