diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index 84b3d152f..11b5d9ea2 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -384,27 +384,6 @@ if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
     if [ ! -f ${SRS_OBJS}/st/libst.a ]; then echo "Build state-threads static lib failed."; exit -1; fi
 fi
 
-#####################################################################################
-# srtp
-#####################################################################################
-if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
-    # Patched ST from https://github.com/ossrs/state-threads/tree/srs
-    if [[ -f ${SRS_OBJS}/srtp2/lib/libsrtp2.a ]]; then
-        echo "The srtp2 is ok.";
-    else
-        echo "Building srtp2.";
-        (
-            rm -rf ${SRS_OBJS}/srtp2 && cd ${SRS_OBJS} &&
-            rm -rf libsrtp-2.0.0 && unzip -q ../3rdparty/libsrtp-2.0.0.zip && cd libsrtp-2.0.0 &&
-            ./configure --prefix=`pwd`/_release && make ${SRS_JOBS} && make install &&
-            cd .. && rm -f srtp2 && ln -sf libsrtp-2.0.0/_release srtp2
-        )
-    fi
-    # check status
-    ret=$?; if [[ $ret -ne 0 ]]; then echo "Build srtp2 failed, ret=$ret"; exit $ret; fi
-    if [ ! -f ${SRS_OBJS}/srtp2/lib/libsrtp2.a ]; then echo "Build srtp2 static lib failed."; exit -1; fi
-fi
-
 #####################################################################################
 # nginx for HLS, nginx-1.5.0
 #####################################################################################