diff --git a/.travis.yml b/.travis.yml
index 4c458e066..c62d7e244 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -148,7 +148,7 @@ install:
   # belonging to nss. You can unlink it" during gtest install
   - test "$TRAVIS_OS_NAME" != "osx" || brew unlink nss
 
-  - test "$TRAVIS_OS_NAME" != "osx" || brew install --HEAD https://gist.githubusercontent.com/Kronuz/96ac10fbd8472eb1e7566d740c4034f8/raw/gtest.rb
+  - test "$TRAVIS_OS_NAME" != "osx" || brew install https://gist.githubusercontent.com/Kronuz/96ac10fbd8472eb1e7566d740c4034f8/raw/gtest.rb
 
 before_script:
   - ccache -s
diff --git a/NEWS b/NEWS
index 1e69582bf..84b9f50bb 100644
--- a/NEWS
+++ b/NEWS
@@ -35,11 +35,12 @@ ver 0.22 (not yet released)
 * switch to C++17
   - GCC 7 or clang 4 (or newer) recommended
 
-ver 0.21.20 (not yet released)
+ver 0.21.20 (2020/02/16)
 * decoder
   - audiofile, ffmpeg, sndfile: handle MIME type "audio/wav"
   - ffmpeg: fix playback of AIFF and TTA
   - vorbis, opus: fix seeking in small files
+* fix backwards seeking on ARM (and other non-x86 CPUs)
 
 ver 0.21.19 (2020/01/17)
 * configuration
diff --git a/src/protocol/ArgParser.cxx b/src/protocol/ArgParser.cxx
index bdbe751f8..fd0c273dc 100644
--- a/src/protocol/ArgParser.cxx
+++ b/src/protocol/ArgParser.cxx
@@ -175,5 +175,5 @@ SignedSongTime
 ParseCommandArgSignedSongTime(const char *s)
 {
 	auto value = ParseCommandArgFloat(s);
-	return SongTime::FromS(value);
+	return SignedSongTime::FromS(value);
 }
diff --git a/test/meson.build b/test/meson.build
index 71dacd67c..0f01aca3e 100644
--- a/test/meson.build
+++ b/test/meson.build
@@ -6,6 +6,7 @@ if compiler.get_id() == 'gcc'
   gtest_compile_args += [
     '-Wno-suggest-attribute=format',
     '-Wno-suggest-attribute=noreturn',
+    '-Wno-missing-declarations',
   ]
 endif