diff --git a/CMakeLists.txt b/CMakeLists.txt
index 962cea32..dc0d4450 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -510,7 +510,7 @@ list (
 
 option (SIMD "enable simd support" OFF)
 
-if (SIM)
+if (SIMD)
     list (APPEND UTIL_FILES
         "coord/simd.cpp"
         "coord/simd.hpp"