diff --git a/test_conformance/conversions/CMakeLists.txt b/test_conformance/conversions/CMakeLists.txt
index 11106439..e2e97667 100644
--- a/test_conformance/conversions/CMakeLists.txt
+++ b/test_conformance/conversions/CMakeLists.txt
@@ -8,14 +8,6 @@ if("${CLConform_TARGET_ARCH}" STREQUAL "ARM" OR "${CLConform_TARGET_ARCH}" STREQ
     list(APPEND ${MODULE_NAME}_SOURCES fplib.cpp)
 endif()
 
-if(NOT CMAKE_CL_64 AND NOT MSVC AND NOT ANDROID)
-# -march is needed for CPU atomics, default arch on gcc is i386
-# that does not support atomics.
-set_source_files_properties(
-        ${MODULE_NAME}_SOURCES
-        COMPILE_FLAGS -march=i686)
-endif(NOT CMAKE_CL_64 AND NOT MSVC AND NOT ANDROID)
-
 set_gnulike_module_compile_flags("-Wno-sign-compare")
 
 include(../CMakeCommon.txt)