diff --git a/level_zero/tools/source/sysman/engine/linux/os_engine_imp_prelim.cpp b/level_zero/tools/source/sysman/engine/linux/os_engine_imp_prelim.cpp
index 179782b2ae..23d9e1f2c1 100644
--- a/level_zero/tools/source/sysman/engine/linux/os_engine_imp_prelim.cpp
+++ b/level_zero/tools/source/sysman/engine/linux/os_engine_imp_prelim.cpp
@@ -60,8 +60,7 @@ static ze_result_t readBusynessFromGroupFd(PmuInterface *pPmuInterface, std::pai
     }
     // In data[], First u64 is "active time", And second u64 is "timestamp". Both in ticks
     pStats->activeTime = data[2];
-    pStats->timestamp = data[3];
-
+    pStats->timestamp = data[3] ? data[3] : SysmanDevice::getSysmanTimestamp();
     return ZE_RESULT_SUCCESS;
 }
 
diff --git a/level_zero/tools/test/unit_tests/sources/sysman/engine/linux/mock_engine_prelim.h b/level_zero/tools/test/unit_tests/sources/sysman/engine/linux/mock_engine_prelim.h
index c276e9aaba..4aab273e9b 100644
--- a/level_zero/tools/test/unit_tests/sources/sysman/engine/linux/mock_engine_prelim.h
+++ b/level_zero/tools/test/unit_tests/sources/sysman/engine/linux/mock_engine_prelim.h
@@ -19,7 +19,6 @@ using namespace NEO;
 namespace L0 {
 namespace ult {
 constexpr int64_t mockPmuFd = 10;
-constexpr uint64_t mockTimestamp = 87654321;
 constexpr uint64_t mockActiveTime = 987654321;
 constexpr uint16_t invalidEngineClass = UINT16_MAX;
 const std::string deviceDir("device");
@@ -107,6 +106,7 @@ struct MockEnginePmuInterfaceImpPrelim : public PmuInterfaceImp {
     bool mockPerfEventOpenRead = false;
     int32_t mockErrorNumber = -ENOSPC;
     int32_t mockPerfEventOpenFailAtCount = 1;
+    uint64_t mockTimestamp = 87654321;
 
     int64_t perfEventOpen(perf_event_attr *attr, pid_t pid, int cpu, int groupFd, uint64_t flags) override {
 
diff --git a/level_zero/tools/test/unit_tests/sources/sysman/engine/linux/test_zes_engine_prelim.cpp b/level_zero/tools/test/unit_tests/sources/sysman/engine/linux/test_zes_engine_prelim.cpp
index a6bafec089..386e19b13d 100644
--- a/level_zero/tools/test/unit_tests/sources/sysman/engine/linux/test_zes_engine_prelim.cpp
+++ b/level_zero/tools/test/unit_tests/sources/sysman/engine/linux/test_zes_engine_prelim.cpp
@@ -237,7 +237,7 @@ TEST_F(ZesEngineFixturePrelim, GivenValidEngineHandleAndIntegratedDeviceWhenCall
         ASSERT_NE(nullptr, handle);
         EXPECT_EQ(ZE_RESULT_SUCCESS, zesEngineGetActivity(handle, &stats));
         EXPECT_EQ(mockActiveTime, stats.activeTime);
-        EXPECT_EQ(mockTimestamp, stats.timestamp);
+        EXPECT_EQ(pPmuInterface->mockTimestamp, stats.timestamp);
     }
 }
 
@@ -253,7 +253,7 @@ TEST_F(ZesEngineFixturePrelim, GivenValidEngineHandleAndDiscreteDeviceWhenCallin
         ASSERT_NE(nullptr, handle);
         EXPECT_EQ(ZE_RESULT_SUCCESS, zesEngineGetActivity(handle, &stats));
         EXPECT_EQ(mockActiveTime, stats.activeTime);
-        EXPECT_EQ(mockTimestamp, stats.timestamp);
+        EXPECT_EQ(pPmuInterface->mockTimestamp, stats.timestamp);
     }
 }
 
@@ -277,7 +277,7 @@ TEST_F(ZesEngineFixturePrelim, GivenValidEngineHandleAndDiscreteDeviceWhenCallin
         EXPECT_EQ(ZE_RESULT_SUCCESS, zesEngineGetActivityExt(handle, &count, engineStats.data()));
         for (auto &stat : engineStats) {
             EXPECT_EQ(mockActiveTime, stat.activeTime);
-            EXPECT_EQ(mockTimestamp, stat.timestamp);
+            EXPECT_EQ(pPmuInterface->mockTimestamp, stat.timestamp);
         }
     }
 }
@@ -304,7 +304,7 @@ TEST_F(ZesEngineFixturePrelim, GivenValidEngineHandleAndDiscreteDeviceWhenCallin
         EXPECT_EQ(ZE_RESULT_SUCCESS, zesEngineGetActivityExt(handle, &count, engineStats.data()));
         for (auto &stat : engineStats) {
             EXPECT_EQ(mockActiveTime, stat.activeTime);
-            EXPECT_EQ(mockTimestamp, stat.timestamp);
+            EXPECT_EQ(pPmuInterface->mockTimestamp, stat.timestamp);
         }
     }
 }
@@ -494,6 +494,20 @@ TEST_F(ZesEngineFixturePrelim, GivenValidEngineHandleWhenCallingZesEngineGetActi
     }
 }
 
+TEST_F(ZesEngineFixturePrelim, GivenValidEngineHandleAndPmuTimeStampIsZeroWhenCallingZesEngineGetActivityThenVerifyValidTimeStampIsReturned) {
+    zes_engine_stats_t stats = {};
+    auto handles = getEngineHandles(handleComponentCount);
+    EXPECT_EQ(handleComponentCount, handles.size());
+    pPmuInterface->mockTimestamp = 0u;
+
+    for (auto handle : handles) {
+        ASSERT_NE(nullptr, handle);
+        EXPECT_EQ(ZE_RESULT_SUCCESS, zesEngineGetActivity(handle, &stats));
+        EXPECT_EQ(mockActiveTime, stats.activeTime);
+        EXPECT_GT(stats.timestamp, 0u);
+    }
+}
+
 TEST_F(ZesEngineFixturePrelim, GivenValidEngineHandleWhenCallingZesEngineGetActivityAndperfEventOpenFailsThenVerifyEngineGetActivityReturnsFailure) {
 
     pPmuInterface->mockPerfEventOpenRead = true;