diff --git a/hidl/livedisplay/AntiFlicker.cpp b/hidl/livedisplay/AntiFlicker.cpp
index 7cab417..0714ec2 100644
--- a/hidl/livedisplay/AntiFlicker.cpp
+++ b/hidl/livedisplay/AntiFlicker.cpp
@@ -20,6 +20,10 @@
 #include <android-base/file.h>
 #include <android-base/strings.h>
 
+using ::android::base::ReadFileToString;
+using ::android::base::Trim;
+using ::android::base::WriteStringToFile;
+
 namespace {
 
 constexpr const char* kDcDimmingPath = "/sys/kernel/oplus_display/dimlayer_bl_en";