diff --git a/libqti-perfd-client/Android.bp b/libqti-perfd-client/Android.bp
index e5cb610..77f9332 100644
--- a/libqti-perfd-client/Android.bp
+++ b/libqti-perfd-client/Android.bp
@@ -11,6 +11,7 @@ cc_library_shared {
         "-Wall",
     ],
     shared_libs: [
+        "liblog",
         "libutils",
     ],
 }
diff --git a/libqti-perfd-client/client.cpp b/libqti-perfd-client/client.cpp
index ad6e693..8c0cee2 100644
--- a/libqti-perfd-client/client.cpp
+++ b/libqti-perfd-client/client.cpp
@@ -1,8 +1,24 @@
+#define LOG_TAG "libqti-perfd-client"
+
 #include <stdint.h>
+#include <log/log.h>
 
 extern "C" void perf_get_feedback() {}
 extern "C" void perf_hint() {}
-extern "C" void perf_lock_acq() {}
+extern "C" int perf_lock_acq(int handle, int duration, int arg3[], int arg4) {
+    ALOGI("perf_lock_acq: handle: %d, duration: %d, arg3[0]: %d, arg4: %d",
+            handle, duration, arg3[0], arg4);
+    if (handle > 0)
+        return handle;
+
+    return 233;
+}
 extern "C" void perf_lock_cmd() {}
-extern "C" void perf_lock_rel() {}
+extern "C" int perf_lock_rel(int handle) {
+    ALOGI("perf_lock_rel: handle: %d", handle);
+    if (handle > 0)
+        return handle;
+
+    return 233;
+}
 extern "C" void perf_lock_use_profile() {}