diff --git a/camera/device/3.2/default/CameraDevice.cpp b/camera/device/3.2/default/CameraDevice.cpp
index dfbb976..297e778 100644
--- a/camera/device/3.2/default/CameraDevice.cpp
+++ b/camera/device/3.2/default/CameraDevice.cpp
@@ -262,7 +262,7 @@
             session->getInterface()->interfaceChain([](
                 ::android::hardware::hidl_vec<::android::hardware::hidl_string> interfaceChain) {
                     ALOGV("Session interface chain:");
-                    for (auto iface : interfaceChain) {
+                    for (const auto& iface : interfaceChain) {
                         ALOGV("  %s", iface.c_str());
                     }
                 });
diff --git a/camera/device/3.3/default/CameraDevice.cpp b/camera/device/3.3/default/CameraDevice.cpp
index ce5e1de..b4d279e 100644
--- a/camera/device/3.3/default/CameraDevice.cpp
+++ b/camera/device/3.3/default/CameraDevice.cpp
@@ -49,7 +49,7 @@
         session->getInterface()->interfaceChain([](
             ::android::hardware::hidl_vec<::android::hardware::hidl_string> interfaceChain) {
                 ALOGV("Session interface chain:");
-                for (auto iface : interfaceChain) {
+                for (const auto& iface : interfaceChain) {
                     ALOGV("  %s", iface.c_str());
                 }
             });
diff --git a/camera/device/3.4/default/CameraDevice.cpp b/camera/device/3.4/default/CameraDevice.cpp
index d73833a..bc443de 100644
--- a/camera/device/3.4/default/CameraDevice.cpp
+++ b/camera/device/3.4/default/CameraDevice.cpp
@@ -49,7 +49,7 @@
         session->getInterface()->interfaceChain([](
             ::android::hardware::hidl_vec<::android::hardware::hidl_string> interfaceChain) {
                 ALOGV("Session interface chain:");
-                for (auto iface : interfaceChain) {
+                for (const auto& iface : interfaceChain) {
                     ALOGV("  %s", iface.c_str());
                 }
             });