diff --git a/trunk/research/arm/jmp.cpp b/trunk/research/arm/jmp.cpp
index 9438caa2c..d8f4d4545 100644
--- a/trunk/research/arm/jmp.cpp
+++ b/trunk/research/arm/jmp.cpp
@@ -1,4 +1,5 @@
 /*
+# see: https://github.com/winlinvip/simple-rtmp-server/wiki/SrsLinuxArm
  arm-linux-gnueabi-g++ -o jmp jmp.cpp -static
  arm-linux-gnueabi-strip jmp
 */
diff --git a/trunk/research/arm/jmp_sp.cpp b/trunk/research/arm/jmp_sp.cpp
index 9a0749c43..fa98b46f5 100644
--- a/trunk/research/arm/jmp_sp.cpp
+++ b/trunk/research/arm/jmp_sp.cpp
@@ -1,4 +1,5 @@
 /*
+# see: https://github.com/winlinvip/simple-rtmp-server/wiki/SrsLinuxArm
  arm-linux-gnueabi-g++ -g -o jmp_sp jmp_sp.cpp -static
  arm-linux-gnueabi-strip jmp_sp
 */
diff --git a/trunk/research/arm/test.cpp b/trunk/research/arm/test.cpp
index e0a0645a9..d21033be8 100644
--- a/trunk/research/arm/test.cpp
+++ b/trunk/research/arm/test.cpp
@@ -1,4 +1,5 @@
 /*
+# see: https://github.com/winlinvip/simple-rtmp-server/wiki/SrsLinuxArm
  arm-linux-gnueabi-g++ -o test test.cpp -static
  arm-linux-gnueabi-strip test
 */