diff --git a/system_wrappers/source/cpu_linux.cc b/system_wrappers/source/cpu_linux.cc
index a7ec506547..eff9704db9 100644
--- a/system_wrappers/source/cpu_linux.cc
+++ b/system_wrappers/source/cpu_linux.cc
@@ -23,9 +23,13 @@ CpuLinux::CpuLinux()
     m_numCores = 0;
     m_numCores = GetNumCores();
     m_oldBusyTimeMulti = new long long[m_numCores];
+    memset(m_oldBusyTimeMulti, 0, sizeof(long long) * m_numCores);
     m_oldIdleTimeMulti = new long long[m_numCores];
+    memset(m_oldIdleTimeMulti, 0, sizeof(long long) * m_numCores);
     m_idleArray = new long long[m_numCores];
+    memset(m_idleArray, 0, sizeof(long long) * m_numCores);
     m_busyArray = new long long[m_numCores];
+    memset(m_busyArray, 0, sizeof(long long) * m_numCores);
     m_resultArray = new WebRtc_UWord32[m_numCores];
 
     GetData(m_oldBusyTime, m_oldIdleTime, m_busyArray, m_idleArray);
diff --git a/system_wrappers/source/trace_linux.cc b/system_wrappers/source/trace_linux.cc
index f4e1d23434..8dba3beba8 100644
--- a/system_wrappers/source/trace_linux.cc
+++ b/system_wrappers/source/trace_linux.cc
@@ -82,8 +82,9 @@ WebRtc_Word32 TraceLinux::AddTime(char* traceMessage,
             dwDeltaTime = 99999;
         }
 
-        sprintf (traceMessage, "(%2u:%2u:%2u:%3u |%5lu) ", systemTime.tm_hour,
-                 systemTime.tm_min, systemTime.tm_sec, 0, dwDeltaTime);
+        sprintf(traceMessage, "(%2u:%2u:%2u:%3u |%5lu) ", systemTime.tm_hour,
+                systemTime.tm_min, systemTime.tm_sec, 0,
+                static_cast<unsigned long>(dwDeltaTime));
     } else {
         WebRtc_UWord32 dwDeltaTime = dwCurrentTimeInSeconds - _prevAPITickCount;
         _prevAPITickCount = dwCurrentTimeInSeconds;
@@ -100,8 +101,9 @@ WebRtc_Word32 TraceLinux::AddTime(char* traceMessage,
         {
             dwDeltaTime = 99999;
         }
-        sprintf (traceMessage, "(%2u:%2u:%2u:%3u |%5lu) ", systemTime.tm_hour,
-                 systemTime.tm_min, systemTime.tm_sec, 0, dwDeltaTime);
+        sprintf(traceMessage, "(%2u:%2u:%2u:%3u |%5lu) ", systemTime.tm_hour,
+                systemTime.tm_min, systemTime.tm_sec, 0,
+                static_cast<unsigned long>(dwDeltaTime));
     }
     // Messages is 22 characters.
     return 22;