diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7d64977..4ec3ebd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -497,6 +497,8 @@ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "GNU
       set_source_files_properties(${SRC_DIR}/simeck-simd.cpp PROPERTIES COMPILE_FLAGS "-mssse3")
       set_source_files_properties(${SRC_DIR}/simon128-simd.cpp PROPERTIES COMPILE_FLAGS "-mssse3")
       set_source_files_properties(${SRC_DIR}/speck128-simd.cpp PROPERTIES COMPILE_FLAGS "-mssse3")
+      set_source_files_properties(${SRC_DIR}/simon-simd.cpp PROPERTIES COMPILE_FLAGS "-mssse3")
+      set_source_files_properties(${SRC_DIR}/speck-simd.cpp PROPERTIES COMPILE_FLAGS "-mssse3")
       if (CRYPTOPP_IA32_SSE41 AND NOT DISABLE_SSE4)
         set_source_files_properties(${SRC_DIR}/blake2-simd.cpp PROPERTIES COMPILE_FLAGS "-msse4.1")
         set_source_files_properties(${SRC_DIR}/simon64-simd.cpp PROPERTIES COMPILE_FLAGS "-msse4.1")
