diff --git a/trunk/auto/setup_variables.sh b/trunk/auto/setup_variables.sh
index 58db73df5..23440a001 100755
--- a/trunk/auto/setup_variables.sh
+++ b/trunk/auto/setup_variables.sh
@@ -17,7 +17,7 @@ else
   SRS_PLATFORM="${SRS_PLATFORM}-${GCC_VERSION}"
 fi
 # Use isolate cache for different SRS version.
-SRS_PLATFORM="${SRS_PLATFORM}-SRS4"
+SRS_PLATFORM="${SRS_PLATFORM}-SRS5"
 
 echo "SRS_WORKDIR: ${SRS_WORKDIR}, SRS_OBJS_DIR: ${SRS_OBJS_DIR}, SRS_OBJS: ${SRS_OBJS}, SRS_PLATFORM: ${SRS_PLATFORM}"