--- SLADE-3.1.13/src/CMakeLists.txt.orig	2021-06-15 14:13:13.473287606 +0200
+++ SLADE-3.1.13/src/CMakeLists.txt	2021-06-15 14:13:28.233451010 +0200
@@ -159,9 +159,6 @@ if(APPLE)
 	set_source_files_properties(${OSX_ICON} PROPERTIES MACOSX_PACKAGE_LOCATION Resources)
 endif(APPLE)
 
-# enable SSE instructions for dumb library
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_USE_SSE -msse")
-
 if(USE_SANITIZER)
 	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")