diff --git a/cmake_targets/CMakeLists.txt b/cmake_targets/CMakeLists.txt
index 8ba602c25d248647570567cba9a113fbe29e4d07..d7a656e61cf1ea376de35dd398c62f6629b981e5 100644
--- a/cmake_targets/CMakeLists.txt
+++ b/cmake_targets/CMakeLists.txt
@@ -133,9 +133,6 @@ else (CMAKE_SYSTEM_PROCESSOR STREQUAL "armv7l")
   if (CPUINFO MATCHES "avx2")
     set(C_FLAGS_PROCESSOR "${C_FLAGS_PROCESSOR} -mavx2")
   endif()
-  if (CPUINFO MATCHES "sse4_2")
-    set(C_FLAGS_PROCESSOR "${C_FLAGS_PROCESSOR} -msse4.2")
-  endif()
   if (CPUINFO MATCHES "sse4_1")
     set(C_FLAGS_PROCESSOR "${C_FLAGS_PROCESSOR} -msse4.1")
   endif()
@@ -149,8 +146,8 @@ set(C_FLAGS_PROCESSOR " ${C_FLAGS_PROCESSOR} ${CFLAGS_PROCESSOR_USER}")
 Message("C_FLAGS_PROCESSOR is ${C_FLAGS_PROCESSOR}")
 
 if (CMAKE_SYSTEM_PROCESSOR MATCHES "x86")
-  if ( (NOT( C_FLAGS_PROCESSOR MATCHES "ssse3")) OR (NOT( C_FLAGS_PROCESSOR MATCHES "msse4.1")) OR (NOT( C_FLAGS_PROCESSOR MATCHES "msse4.2")) )
-    Message(FATAL_ERROR "For x86 Architecture, you must have following flags: -mssse3 -msse4.1 -msse4.2. The current detected flags are: ${C_FLAGS_PROCESSOR}. You can pass the flags manually in build script, for example: ./build_oai --cflags_processor \"-mssse3 -msse4.1 -msse4.2\" ")
+  if ( (NOT( C_FLAGS_PROCESSOR MATCHES "ssse3")) OR (NOT( C_FLAGS_PROCESSOR MATCHES "msse4.1")) )
+    Message(FATAL_ERROR "For x86 Architecture, you must have following flags: -mssse3 -msse4.1. The current detected flags are: ${C_FLAGS_PROCESSOR}. You can pass the flags manually in build script, for example: ./build_oai --cflags_processor \"-mssse3 -msse4.1\" ")
   endif()
 endif()
 
diff --git a/cmake_targets/tools/build_helper b/cmake_targets/tools/build_helper
index 004c83f0b842a00ec2a7c75cf326e1d7d4d1cdb1..c82b79499c095b5726e2993a9a4d57e43e3f067e 100755
--- a/cmake_targets/tools/build_helper
+++ b/cmake_targets/tools/build_helper
@@ -210,7 +210,8 @@ check_install_additional_tools (){
 	unzip  \
 	valgrind  \
 	vlan	  \
-	ctags
+	ctags \
+        ntpdate
       ) >& $log_file
 }