diff --git a/package/libplayer/Config.in b/package/libplayer/Config.in
index 665b947d4b..37fbb26c5b 100644
--- a/package/libplayer/Config.in
+++ b/package/libplayer/Config.in
@@ -12,6 +12,7 @@ if BR2_PACKAGE_LIBPLAYER
 config BR2_PACKAGE_LIBPLAYER_MPLAYER
 	bool "mplayer backend"
 	depends on BR2_PACKAGE_MPLAYER_ARCH_SUPPORTS
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # mplayer
 	select BR2_PACKAGE_MPLAYER
 
 config BR2_PACKAGE_LIBPLAYER_GSTREAMER
diff --git a/package/mplayer/Config.in b/package/mplayer/Config.in
index 97b1f38798..76bb6f077c 100644
--- a/package/mplayer/Config.in
+++ b/package/mplayer/Config.in
@@ -10,6 +10,7 @@ config BR2_PACKAGE_MPLAYER_ARCH_SUPPORTS
 config BR2_PACKAGE_MPLAYER
 	bool "mplayer"
 	depends on BR2_PACKAGE_MPLAYER_ARCH_SUPPORTS
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	help
 	  MPlayer is a movie player which runs on many systems and supports
@@ -19,6 +20,7 @@ config BR2_PACKAGE_MPLAYER
 
 comment "mplayer needs a toolchain w/ threads"
 	depends on BR2_PACKAGE_MPLAYER_ARCH_SUPPORTS
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	depends on !BR2_TOOLCHAIN_HAS_THREADS
 
 if BR2_PACKAGE_MPLAYER
diff --git a/package/tovid/Config.in b/package/tovid/Config.in
index 1288f849e2..d8052ea334 100644
--- a/package/tovid/Config.in
+++ b/package/tovid/Config.in
@@ -7,6 +7,7 @@ config BR2_PACKAGE_TOVID
 	depends on BR2_PACKAGE_PYTHON || BR2_PACKAGE_PYTHON3
 	depends on BR2_PACKAGE_FFMPEG_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_MPLAYER_ARCH_SUPPORTS
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # mplayer
 	# The below dependencies are runtime dependencies only
 	select BR2_PACKAGE_BUSYBOX_SHOW_OTHERS # procps_ng
 	select BR2_PACKAGE_DVDAUTHOR
@@ -30,6 +31,7 @@ comment "tovid needs a toolchain w/ threads, C++, wchar"
 	depends on BR2_USE_MMU
 	depends on BR2_PACKAGE_FFMPEG_ARCH_SUPPORTS
 	depends on BR2_PACKAGE_MPLAYER_ARCH_SUPPORTS
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	depends on !BR2_TOOLCHAIN_HAS_THREADS \
 		|| !BR2_INSTALL_LIBSTDCPP \
 		|| !BR2_USE_WCHAR