diff --git a/CMakeLists.txt b/CMakeLists.txt
index 496a71a0..d192e50f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,6 +22,7 @@ option(LOVR_USE_OPENVR "Enable the OpenVR backend for the headset module" ON)
 option(LOVR_USE_WEBVR "Enable the WebVR backend for the headset module" OFF)
 option(LOVR_USE_OCULUS "Enable the LibOVR backend for the headset module (be sure to also set LOVR_OCULUS_PATH to point to the Oculus SDK)" OFF)
 option(LOVR_USE_FAKE_HEADSET "Enable the keyboard/mouse backend for the headset module" ON)
+option(LOVR_USE_SSE "Enable SIMD use of intrinsics" ON)
 
 option(LOVR_SYSTEM_PHYSFS "Use the system-provided PhysFS" OFF)
 option(LOVR_SYSTEM_ASSIMP "Use the system-provided Assimp" OFF)
@@ -58,6 +59,7 @@ if(EMSCRIPTEN)
   set(LOVR_USE_WEBVR ON)
   set(LOVR_USE_OPENVR OFF)
   set(LOVR_USE_OCULUS OFF)
+  set(LOVR_USE_SSE OFF)
 elseif(UNIX)
   if(APPLE)
     set(CMAKE_MACOSX_RPATH 1)
diff --git a/src/math/mat4.c b/src/math/mat4.c
index 6eac7b84..1f78190e 100644
--- a/src/math/mat4.c
+++ b/src/math/mat4.c
@@ -3,6 +3,9 @@
 #include "math/vec3.h"
 #include <math.h>
 #include <string.h>
+#ifdef LOVR_USE_SSE
+#include <xmmintrin.h>
+#endif
 
 // m0 m4 m8  m12
 // m1 m5 m9  m13