diff --git a/cmake/cflags-x86.cmake b/cmake/cflags-x86.cmake
index 4e2b8a7d..020064fe 100644
--- a/cmake/cflags-x86.cmake
+++ b/cmake/cflags-x86.cmake
@@ -25,6 +25,10 @@ if (NOT FAT_RUNTIME)
         set(ARCH_C_FLAGS "-mavx2")
         set(ARCH_CXX_FLAGS "-mavx2")
         set(X86_ARCH "core-avx2")
+    elseif (BUILD_SSE2_SIMDE)
+        set(ARCH_C_FLAGS "-msse2")
+        set(ARCH_CXX_FLAGS "-msse2")
+        set(X86_ARCH "x86-64")
     else()
         set(ARCH_C_FLAGS "-msse4.2")
         set(ARCH_CXX_FLAGS "-msse4.2")