diff --git a/cmake/Modules/FindLLVM.cmake b/cmake/Modules/FindLLVM.cmake
index b99a47ae..47fea36f 100644
--- a/cmake/Modules/FindLLVM.cmake
+++ b/cmake/Modules/FindLLVM.cmake
@@ -95,13 +95,13 @@ else()
     llvm_set(LIBRARY_DIRS libdir)
     llvm_set_libs(LIBRARIES libfiles "${LLVM_LIBRARY_DIRS}/")
     llvm_set(ROOT_DIR prefix)
+endif()
 
-    # On CMake builds of LLVM, the output of llvm-config --cxxflags does not
-    # include -fno-rtti, leading to linker errors. Be sure to add it.
-    if(CMAKE_COMPILER_IS_GNUCXX OR ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang"))
-        if(NOT ${LLVM_CXXFLAGS} MATCHES "-fno-rtti")
-            set(LLVM_CXXFLAGS "${LLVM_CXXFLAGS} -fno-rtti")
-        endif()
+# On CMake builds of LLVM, the output of llvm-config --cxxflags does not
+# include -fno-rtti, leading to linker errors. Be sure to add it.
+if(CMAKE_COMPILER_IS_GNUCXX OR ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang"))
+    if(NOT ${LLVM_CXXFLAGS} MATCHES "-fno-rtti")
+        set(LLVM_CXXFLAGS "${LLVM_CXXFLAGS} -fno-rtti")
     endif()
 endif()