diff --git a/environments/opteesp/default_toolchain_file.cmake b/environments/opteesp/default_toolchain_file.cmake
index ec5b4d7..90a9418 100644
--- a/environments/opteesp/default_toolchain_file.cmake
+++ b/environments/opteesp/default_toolchain_file.cmake
@@ -20,7 +20,7 @@
 set(CMAKE_POSITION_INDEPENDENT_CODE True)
 
 set(TS_DEBUG_INFO_FLAGS "-fdiagnostics-show-option -gdwarf-2" CACHE STRING "Compiler flags to add debug information.")
-set(TS_MANDATORY_AARCH_FLAGS "-fpic -mstrict-align" CACHE STRING "Compiler flags configuring architecture specific ")
+set(TS_MANDATORY_AARCH_FLAGS "-fpic -mstrict-align -march=armv8-a+crc" CACHE STRING "Compiler flags configuring architecture specific ")
 set(TS_WARNING_FLAGS "-Wall" CACHE STRING "Compiler flags affecting generating warning messages.")
 set(TS_MANDATORY_LINKER_FLAGS "-pie -Wl,--as-needed -Wl,--sort-section=alignment -zmax-page-size=4096"
 	CACHE STRING "Linker flags needed for correct builds.")