diff --git a/cmake/simde.cmake b/cmake/simde.cmake
new file mode 100644
index 00000000..b68c8e57
--- /dev/null
+++ b/cmake/simde.cmake
@@ -0,0 +1,5 @@
+include_directories(${PROJECT_SOURCE_DIR}/simde/simde)
+
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DSIMDE_BACKEND")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DSIMDE_BACKEND")
+