diff --git a/CMakeLists.txt b/CMakeLists.txt
index 20354b7a6c..160e39ae5a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,6 +96,7 @@ if( NOT WIN32 )
         file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/_env/VIRCADIA_OPTIMIZE.txt" "${VIRCADIA_OPTIMIZE}")
         if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
             message("Clang compiler detected, adding -O3 -fPIC flags")
+            set(VIRCADIA_OPTIMIZE_FLAGS "-O3 -fPIC")
         elseif (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
             message("GCC compiler detected, adding -O3 -fPIC flags")
             set(VIRCADIA_OPTIMIZE_FLAGS "-O3 -fPIC")