diff --git a/client/Makefile.am b/client/Makefile.am
index 88f84f3d5..92a648635 100644
--- a/client/Makefile.am
+++ b/client/Makefile.am
@@ -1,6 +1,6 @@
 bin_PROGRAMS = vcmiclient
 
-vcmiclient_LDADD = $(top_builddir)/lib/libvcmi.la @SDL_LIBS@ @FFMPEG_LIBS@ @BOOST_PROGRAM_OPTIONS_LIB@
+vcmiclient_LDADD = $(top_builddir)/lib/libvcmi.la @SDL_LIBS@ @FFMPEG_LIBS@ @BOOST_PROGRAM_OPTIONS_LIB@ -lrt
 vcmiclient_CXXFLAGS = @SDL_CXXFLAGS@ @FFMPEG_CXXFLAGS@
 vcmiclient_LDFLAGS = -L$(top_builddir)/lib
 vcmiclient_SOURCES =  \
diff --git a/client/Makefile.in b/client/Makefile.in
index 94b3dee71..18fdf1f61 100644
--- a/client/Makefile.in
+++ b/client/Makefile.in
@@ -273,7 +273,7 @@ target_alias = @target_alias@
 top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-vcmiclient_LDADD = $(top_builddir)/lib/libvcmi.la @SDL_LIBS@ @FFMPEG_LIBS@ @BOOST_PROGRAM_OPTIONS_LIB@
+vcmiclient_LDADD = $(top_builddir)/lib/libvcmi.la @SDL_LIBS@ @FFMPEG_LIBS@ @BOOST_PROGRAM_OPTIONS_LIB@ -lrt
 vcmiclient_CXXFLAGS = @SDL_CXXFLAGS@ @FFMPEG_CXXFLAGS@
 vcmiclient_LDFLAGS = -L$(top_builddir)/lib
 vcmiclient_SOURCES = \
diff --git a/configure b/configure
index 284119d0b..3f0bc415f 100755
--- a/configure
+++ b/configure
@@ -16287,7 +16287,7 @@ saved_CFLAGS=$CFLAGS
 FFMPEG_CXXFLAGS=""
 FFMPEG_LIBS=
 
-LIBS="$LIBS `pkg-config --libs libavformat libswscale`"
+LIBS="$LIBS `pkg-config --libs libavcodec libavformat libavutil libswscale`"
 CFLAGS="$CFLAGS `pkg-config --cflags libavformat libswscale`"
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for av_open_input_file in -lavformat" >&5
diff --git a/configure.ac b/configure.ac
index cd719e494..3f5010e9e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -86,7 +86,7 @@ saved_CFLAGS=$CFLAGS
 FFMPEG_CXXFLAGS=""
 FFMPEG_LIBS=
 
-LIBS="$LIBS `pkg-config --libs libavformat libswscale`"
+LIBS="$LIBS `pkg-config --libs libavcodec libavformat libavutil libswscale`"
 CFLAGS="$CFLAGS `pkg-config --cflags libavformat libswscale`"
 
 AC_CHECK_LIB(avformat,av_open_input_file,,AC_MSG_ERROR([FFMpeg avformat library not found. Please install it.]))
diff --git a/server/Makefile.am b/server/Makefile.am
index f593da912..33c8241e0 100644
--- a/server/Makefile.am
+++ b/server/Makefile.am
@@ -1,6 +1,6 @@
 bin_PROGRAMS = vcmiserver
 
-vcmiserver_LDADD = $(top_builddir)/lib/libvcmi.la
+vcmiserver_LDADD = $(top_builddir)/lib/libvcmi.la -lrt
 vcmiserver_CXXFLAGS = @SDL_CXXFLAGS@
 vcmiserver_LDFLAGS = -L$(top_builddir)/lib
 vcmiserver_SOURCES = \
diff --git a/server/Makefile.in b/server/Makefile.in
index 856b64ec4..83f6d7e37 100644
--- a/server/Makefile.in
+++ b/server/Makefile.in
@@ -250,7 +250,7 @@ target_alias = @target_alias@
 top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-vcmiserver_LDADD = $(top_builddir)/lib/libvcmi.la
+vcmiserver_LDADD = $(top_builddir)/lib/libvcmi.la -lrt
 vcmiserver_CXXFLAGS = @SDL_CXXFLAGS@
 vcmiserver_LDFLAGS = -L$(top_builddir)/lib
 vcmiserver_SOURCES = \