diff --git a/CMakeLists.txt b/CMakeLists.txt
index a1a54197e263a54596c97079b7c3eac915735cee..1c645bbdcf9122d0e5b66a3f659ae489c03f9b53 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -137,7 +137,7 @@ if(NOT INASTEMP_AS_SUBPROJECT)
     SET( INASTEMP_EXTRA_CXX_FLAGS_DEBUG "-O0" CACHE STRING "These flags are added to the usual ones for DEBUG"  )
     set(CMAKE_CXX_FLAGS_DEBUG  "${CMAKE_CXX_FLAGS_DEBUG} ${INASTEMP_EXTRA_CXX_FLAGS_DEBUG}")
 
-    set(INASTEMP_CXX_FLAGS "${INASTEMP_CXX_FLAGS} -fpic -Wextra -Wnon-virtual-dtor -Wshadow -Wpointer-arith -Wcast-qual -Wconversion  -Wall -Wno-sign-conversion -pedantic -Wold-style-cast -Woverloaded-virtual -Wpointer-arith -Wcast-qual -Wconversion -Wno-error")
+    set(INASTEMP_CXX_FLAGS "${INASTEMP_CXX_FLAGS} -fpic -Wextra -Wnon-virtual-dtor -Wshadow -Wpointer-arith -Wcast-qual -Wconversion  -Wall -Wno-sign-conversion -pedantic -Woverloaded-virtual -Wpointer-arith -Wcast-qual -Wconversion -Wno-error")
 
     if(CMAKE_SIZEOF_VOID_P EQUAL 8)
         set(INASTEMP_CXX_FLAGS  "${INASTEMP_CXX_FLAGS} -m64")
@@ -149,6 +149,12 @@ if(NOT INASTEMP_AS_SUBPROJECT)
     endif(INASTEMP_ATTACHE_SOURCE)
 endif()
 
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "icpc.*$")
+  set(INASTEMP_CXX_FLAGS "${INASTEMP_CXX_FLAGS} -diag-disable 2304 -diag-disable 10121 -diag-disable 10120")
+else()
+  set(INASTEMP_CXX_FLAGS "${INASTEMP_CXX_FLAGS} -Wold-style-cast")
+endif()
+
 #===========================================================================
 # Generate config
 #===========================================================================
diff --git a/CMakeModules/GetCompilerInfos.cmake b/CMakeModules/GetCompilerInfos.cmake
index 443e7f38de75ebf3abc14344c3be5b16ab4e3def..56ba89fe26fe86e183d43113f1dfdd9b2bc83285 100644
--- a/CMakeModules/GetCompilerInfos.cmake
+++ b/CMakeModules/GetCompilerInfos.cmake
@@ -85,7 +85,7 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
         set(SSSE3_FLAGS "-mssse3 ${ARCH_NATIVE_FLAG}")
         set(SSE41_FLAGS  "-msse4 -msse4.1 ${ARCH_NATIVE_FLAG}")
         set(SSE42_FLAGS  "-msse4 -msse4.2 ${ARCH_NATIVE_FLAG}")
-        set(AVX_FLAGS  "-mAVX ${ARCH_NATIVE_FLAG}")
+        set(AVX_FLAGS  "-march=core-avx-i ${ARCH_NATIVE_FLAG}")
         set(AVX2_FLAGS "-march=core-avx2 ${ARCH_NATIVE_FLAG}")
         set(AVX512KNL_FLAGS "-xCOMMON-AVX512 -xMIC-AVX512 ${ARCH_NATIVE_FLAG}")
     endif()
diff --git a/README.md b/README.md
index 73364e84616dc8c858c2688facb5e854a0ffb90e..4531db121b1effef363f4d55eba8ae15ae0822f0 100644
--- a/README.md
+++ b/README.md
@@ -138,11 +138,18 @@ Such that, if one wants to compile only some files with these specific flags, it
 ### Compilers support
 
 Inastemp was developed and tested using the following compilers on the x86_64 architecture.
-- Gcc 6.1 (earlier versions if AVX512/KNL is not used)
+- Gcc 6.1 (earlier versions if AVX512/KNL is not used, like 4.9)
 - Clang 3.5
 - Intel 16.0
 Earlier versions may work as well.
 
+- Intel special flags
+We pass `-diag-disable 2304 -diag-disable 10121 -diag-disable 10120` to intel compiler to remove the implicit conversion warnings between Inastemp classes.
+In fact, we voluntarily want implicit conversion because it helps us to factorize and reduce the number of lines drastically.
+
+User can add the following flags to push for more inlining `-inline-forceinline -no-inline-max-total-size` for intel compiler.
+However, it looks like such options do not work for several compiler versions, and thus we do not want to add them by default.
+
 ### Multiple hardwares compilation
 
 Inastemp is not designed to compile a binary targeting multiple hardwares (like having an execution path for the different possibilities).