diff --git a/linux/installer/bin/build-installpkg.sh b/linux/installer/bin/build-installpkg.sh
index 5db4537402..83da0511c8 100755
--- a/linux/installer/bin/build-installpkg.sh
+++ b/linux/installer/bin/build-installpkg.sh
@@ -57,8 +57,8 @@ BUILD_DIR=${ROOT_DIR}/build/linux
 # Get the architecture of the build from generated binary
 get_arch()
 {
-    local a=$(readelf -h $BUILD_DIR/sgx_sign | awk '/Class:/{print $2}')
-    test $a = ELF64 && echo 'x86_64' || echo 'x86'
+    local a=$(readelf -h $BUILD_DIR/sgx_sign | sed -n '2p' | awk '/:/{print $6}')
+    test $a = 02 && echo 'x86_64' || echo 'x86'
 }
  
 
diff --git a/linux/installer/common/psw/createTarball.sh b/linux/installer/common/psw/createTarball.sh
index aa89c97c75..a78f83c4dd 100755
--- a/linux/installer/common/psw/createTarball.sh
+++ b/linux/installer/common/psw/createTarball.sh
@@ -47,8 +47,8 @@ rm -fr ${INSTALL_PATH}
 # Get the architecture of the build from generated binary
 get_arch()
 {
-    local a=$(readelf -h $BUILD_DIR/sgx_sign | awk '/Class:/{print $2}')
-    test $a = ELF64 && echo 'x64' || echo 'x86'
+    local a=$(readelf -h $BUILD_DIR/sgx_sign | sed -n '2p' | awk '/:/{print $6}')
+    test $a = 02 && echo 'x64' || echo 'x86'
 }
 
 ARCH=$(get_arch)
diff --git a/linux/installer/common/sdk/createTarball.sh b/linux/installer/common/sdk/createTarball.sh
index 69f5253b0e..9d3e12ebfb 100755
--- a/linux/installer/common/sdk/createTarball.sh
+++ b/linux/installer/common/sdk/createTarball.sh
@@ -47,8 +47,8 @@ rm -fr ${INSTALL_PATH}
 # Get the architecture of the build from generated binary
 get_arch()
 {
-    local a=$(readelf -h $BUILD_DIR/sgx_sign | awk '/Class:/{print $2}')
-    test $a = ELF64 && echo 'x64' || echo 'x86'
+    local a=$(readelf -h $BUILD_DIR/sgx_sign | sed -n '2p' | awk '/:/{print $6}')
+    test $a = 02 && echo 'x64' || echo 'x86'
 }
 
 ARCH=$(get_arch)